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Greater involvement of women is globally believed to enhance environmental management outcomes. However, despite being disproportionately affected by environmental degradation primarily caused by oil spills in the Niger Delta region of Nigeria, women in the region are often excluded in environmental decision-making processes. Women involved in farming and fishing face increased vulnerability to contaminated land, food insecurity and conflicts driven by environmental degradation. Using a mixed approach, women, lawmakers, policymakers, regulators, civil society organizations, environmental management practitioners, and government agents responsible for environmental remediation were engaged through interviews, focus group discussions and questionnaires to examine women inclusion in environmental decision-making and governance in the Ogoni contaminated land remediation project in the Niger Delta region of Nigeria. The results indicate that lack of trust and confidence in drivers of environmental decision-making process could affect women participation and involvement in environmental management. Although cultural beliefs and practices impede women participation in the region, women participation in itself does not translate to inclusion in environmental decision-making due to limited capacity, confidence and trust in the process. Creating platforms for capacity building, developing gender policy, adapting appropriate communication strategy, initiating women networks and strengthening social cohesion could enhance women involvement in environmental decision-making in regions with similar cultural context to the Niger Delta region.

This study documents the socio-economic baselines in selected oil-impacted communities prior to the commencement of the Ogoni clean-up and restoration project. Adopting mixed approach consisting of semi-structured interviews, focus group discussions (FGDs), key informant interviews (KIIs), and household surveys, we surveyed the pre-remediation socio-economic conditions in the Ogoniland communities between July 2018 to March 2019. Results indicated that almost all respondents (99.6%) agreed that the smell of petroleum products or crude oil was evident in the air they breathed even as there were visible black particles (soot) in the respondents’ nostrils, on their clothes and in water. The respondents described the ambient air as smoky, and choked with an offensive smell. The household waters were smelly, brownish, or oily, and most respondents (76%) cannot afford to treat their water. Forty-two percent of the respondents who relied on fishing and farming for a living sought for alternative means of subsistence and acknowledged that oil pollution caused stunted growth and low crop yield. The majority of respondents (91%) reported falling fish catches, while the fish caught smell and taste of oil, lowering their market value and posing a potential health risk to consumers. It is evident that oil pollution has impacted the socio-ecological values and sustainable livelihood in Ogoniland. This study provides a framework for monitoring post-remediation socio-economic improvements in Ogoniland. It also highlights areas of urgent intervention to improve livelihood, and access to basic amenities (e.g., potable drinking water), waste management infrastructure, and statutory policy changes for sustainable development in Ogoniland.

Nigeria is among the world's leading gas flaring nations. High concentrations of contaminants, including Particulate Matter (PM2.5, and PM10), carbon dioxide (CO2), sulfur oxide (SOx) and nitrogen oxide (NOx), affect air quality in the Niger Delta region – the hub of oil and gas production in Nigeria. The COVID-19 pandemic-induced lockdown of Port Harcourt provided an opportunity to assess air quality to ascertain baseline levels for carbon dioxide, temperature, humidity, PM2.5 and PM10. Low-cost air quality monitors (LCMs) were deployed in residential, industrial, and commercial areas to provide air quality baselines for different zones in Port Harcourt across a five-day period (April 18 to April 22, 2020). The results indicated that Borokiri area (on a 24 h Mean) had the highest PM2.5 (304 0 μg/m3), while Nkporlu had the highest PM10 (575 μg/m3). When compared to the WHO 24Hrs Mean standards, the results across the assessed locations indicated that citizens within the Port Harcourt Metropolitan area are exposed to potential respiratory and cardiovascular health risks due to poor air quality. Respiratory and cardiovascular diseases have been identified as underlying illnesses that enhance the lethal effects of and vulnerability to COVID-19. The results also indicate that during periods of restricted movement and low industrial activity Port Harcourt can experience quite low levels of air pollution, as well as highlighted that limited sources of air quality impairment (e.g., generators used for power, gas flaring and artisanal refining of oil) persist despite the lockdown of economic and transport activities. The study provides a starting point for further research that aims to broaden understanding of the trends and patterns in air quality impairment in Port Harcourt and other parts of the Niger Delta. It also highlights the urgency for remedial contextual regulatory policy, legislation, informed advocacy, and citizen stewardship.

Mangroves are vulnerable to varying magnitudes of degrading impact by human activities. Despite the many benefits of mangrove ecosystems, mangroves in the Niger Delta region are often cleared for e...

Heavy metal contamination in water and sediment is a serious concern, particularly in natural resource-dependent countries. In most coastal communities in these countries, drinking water quality, stable food, and livelihoods are primarily dependent on ecological systems and marine resources (e.g., sediments and fish), thus humans and other receptors are exposed to heavy metal risks through ingestion and dermal contact. This research evaluated the potential ecological risks of heavy metals including Cadmium (Cd), Chromium (Cr), Nickel (Ni) and Lead (Pb) in water, sediments, and shellfishes (C. amnicola, U. tangeri, T. fuscatus, P. monodon) along the Oproama creeks in Niger Delta, Nigeria. The concentrations of heavy metals were measured in three stations within the waterways using the Atomic Absorption Spectrophotometer (AAS) and their relative ecological and human health risk analysed. Health risk evaluation of individual heavy metals in shellfish tissue indicates an adverse health impact. The high mean carcinogenic and non-carcinogenic hazard index (HI) values of Cd (3.74), Pb (4.3), and Cr (8.4) recorded in the shellfish were significantly greater than 1, while the degree of contamination in the sediment (110.84) and water (60.15) were greater than 24 which is an indication of potential adverse ecological and human health impacts for different age groups and residents in the area. This establishes a significant possibility of heavy metal risks to public health, water quality and marine organisms. While in-depth health analysis is recommended, there is an urgent need to reduce oil spills, and an intentional provision of sustainable livelihoods to the local population.

Mangroves supply various goods and provide invaluable ecological services to humanity. They serve as habitat to different species of fishes, provide a variety of plant products, improve water quality, provide fish and shellfish for local communities, ensure coastal stabilization, provide food chain support for near-shore fisheries, and undertake carbon sequestration. They also serve as source of fuel, medicinal ornaments, and honey for the local population. Despite these socio-economic and environmental benefits of mangroves, its depletion is a continuous practice in the Niger Delta region of Nigeria. This is caused primarily by anthropogenic activities, including over exploitation, oil spills, and crude oil exploratory activities. These activities have destroyed livelihood structures, affected global warming control measures, and affected the coastal system stabilization of the Niger Delta region. This paper reviews existing literature and analysed identified gaps. The review indicated a lack of participatory framework for mangrove conservation in coastal communities in the Niger Delta despite the desperate need given the level of mangrove degradation in the region. In addition, mangrove conservation policies exclude community participation and negates co-management frameworks for mangrove conservation and protection in the region. This paper reviews the impacts of land contamination on mangrove ecosystems and socio-economic activities of local communities in the Niger Delta region of Nigeria. A framework for mangrove conservation in the coastal communities is also proposed, with emphasis on the need to develop the capacity of a critical mass of locals and provide low-to medium-level manpower in mangrove restoration in the Niger Delta region.

Environmental pollution mitigation measure involving bioremediation technology is a sustainable intervention for a greener ecosystem biorecovery, especially the obnoxious hydrocarbons, xenobiotics, and other environmental pollutants induced by anthropogenic stressors. Several successful case studies have provided evidence to this paradigm including the putative adoption that the technology is eco-friendly, cost-effective, and shows a high tendency for total contaminants mineralization into innocuous bye-products. The present review reports advances in bioremediation, types, and strategies conventionally adopted in contaminant clean-up. It identified that natural attenuation and biostimulation are faced with notable limitations including the poor remedial outcome under the natural attenuation system and the residual contamination occasion following a biostimulation operation. It remarks that the use of genetically engineered microorganisms shows a potentially promising insight as a prudent remedial approach but is currently challenged by few ethical restrictions and the rural unavailability of the technology. It underscores that bioaugmentation, particularly the use of high cell density assemblages referred to as microbial consortia possess promising remedial prospects thus offers a more sustainable environmental security. The authors, therefore, recommend bioaugmentation for large scale contaminated sites in regions where environmental degradation is commonplace.

Transfer of environmental policy from one country to another without consideration for the contextual differences (e.g. socio-cultural, economic) between the countries can be a barrier that prevents adoption, or limits the implementation and effectiveness of that policy. In this study, we investigate the socio-cultural preferences of stakeholders in the Niger Delta to understand how different stakeholder groups value socio-cultural differences. We used a modified, mixed-methods stakeholder engagement approach to capture this information, combining stakeholder workshops and interviews. Community groups, regulators, experts in contaminated land management, and oil exploration operators participated in this study, and our results revealed a general consensus concerning the ranked priority of issues. Top issues included water quality, soil quality for agriculture, food production, and human health and wellbeing. Despite this consensus, differences in how stakeholder groups arrived at their rankings might pose a challenge for policy makers. Other potential barriers to effective policy transfer identified in this study include political and cultural differences, regulatory structure, and corruption. In sum, this study provides insights about the socio-cultural preferences of stakeholders from the Niger Delta; information that could be used by policy makers to contextualise contaminated land management policy transfer.

The Ogoniland region of the Niger Delta contains a vast number of sites contaminated with petroleum hydrocarbons that originated from Nigeria's active oil sector. The United Nations Environment Programme (UNEP) reported on this widespread contamination in 2011, however, wide-scale action to clean-up these sites has yet to be initiated. A challenge for decision makers responsible for the clean-up of these sites has been the prioritisation of sites to enable appropriate allocation of scarce resources. In this study, a risk-based multi-criteria decision analysis framework was used to prioritise high-risk sites contaminated with petroleum hydrocarbons in the Ogoniland region of Nigeria. The prioritisation method used a set of risk-based attributes that took into account chemical and ecological impacts, as well as socio-economic impacts, providing a holistic assessment of the risk. Data for the analysis was taken from the UNEP Environmental Assessment of Ogoniland, where over 110 communities were assessed for oil-contamination. Results from our prioritisation show that the highest-ranking sites were not necessarily the sites with the highest observed level of hydrocarbon contamination. This differentiation was due to our use of proximity as a surrogate measure for likelihood of exposure. Composite measures of risk provide a more robust assessment, and can enrich discussions about risk management and the allocation of resources for the clean-up of affected sites.

The Niger Delta is the third largest wetland in the world and has Africa's largest expanse of mangroves. It is Nigeria's oil and gas hub and hot spot of biodiversity, including endemics. The region is, therefore, critically strategic for conservation of environmental quality, especially biodiversity, of the Gulf of Guinea. However, the delta's environmental integrity has been heavily impacted by numerous human activities particularly oil and gas industrialization and local livelihood resource extraction. Government agencies, educational and research institutions as well as independent researchers have not been able to study and monitor the environmental quality of the Niger Delta coast in sufficient detail. Lack of requisite human resources (technical expertise and number of personnel), gaps in sampling and analytical tools, inadequate government and non-governmental incentives, poor funding, insecurity and the remoteness of some of the coastal environments are the major challenges. The need to involve multiple stakeholders, including ordinary citizens in monitoring and reporting changes in the Niger Delta coastal land- and seascape is stressed. Leveraging on two empirical case studies, this paper discusses the prospects and challenges anticipated with the novelty of engaging community science (non-scientists) in monitoring environmental, especially biodiversity changes in the Niger Delta region. The proposed framework for engaging community science would serve, as exemplar, for similar regional context where human capital required for effective environmental monitoring is inadequate.

African nations are experiencing rapid economic growth and development, particularly within the energy sector; however, this growth has come at a cost to the environment and society. Nowhere have these impacts been felt more precisely than in the oil and gas-producing regions of Nigeria where years of neglect and mismanagement have resulted in vast areas of hydrocarbon-contaminated lands. In this chapter, we present a case study of the Niger Delta. We show how constructive stakeholder engagement can be used to integrate the values and perspectives of affected communities and how this information can be used to inform environmental regulation and sustainable development. Lessons learned are relevant to other countries seeking to develop their energy resources in a sustainable manner.

Coastal oil spills constitute significant threat to biotic energy distribution, and biodiversity integrity amongst others. This study monitored the recovery of low-intertidal, soft-bottom infauna macrobenthic invertebrates in Bodo Creek intermittently over a 7-year period post oil spill. Samples were taken twice a month (spring and neap low tides) for 6 months (September 2015-February 2016) at sites previously studied (pre-spill baseline studies, 3-year and 5-year post-spill studies) for the effects of oil pollution using the same sampling methods used during initial studies of the same area. Comparatively, the initial studies reported Polychaeta as the dominant class against the dominant Crustacea reported in this 7-year post-spill study, indicating a change in the community structure of the study area. Infauna macro-invertebrate communities recorded showed an improvement (that is, increased species richness and number of individuals) over the initial 3-year and 5-year post-spill studies. However, relating the results to the initial baseline pre-spill studies, an annual average of 9.7% recovery rate was observed. Analysis of results showed that the total hydrocarbon content (THC) of the sediment remained high (90.08-12,184 mg/kg) but was markedly lower than levels observed during the initial post-spill study (6422-7186 mg/kg). Tidal flushing and biodegradation processes were deemed responsible for the reduction in THC. This study provides a rare dataset that describes the effects of oil pollution on a previously near-pristine estuarine environment in the tropics.

Environmental pollution occasioned by artisanal activities and technical failures at exploration sites has affected mostly oil producing and other mineral resources mining regions in developed and developing nations. As conventional techniques of remediation seem to be progressively unreliable and inefficient, contaminated land management experts have adopted a plant-based technology described as 'phytoremediation' for effective detoxification and removal of contaminants in substrate environmental media (soil and sediment). This technique, has gained public acceptance because of its aesthetic, eco-friendly, solar energy driven and low cost attributes. With complexity of environmental pollution in Africa, identification of appropriate remediation approach that deliver net environmental benefit and economic profit to the society is vital, while also focusing on the exploitation of plants genetic tools for more clarity on phyto tolerance, uptake and translocation of pollutants. In this article, we reviewed the status, progress and challenges of phytoremediation in selected African countries (South Africa, Nigeria, Tanzania, Zambia, Egypt and Ghana), the ecological impact of the pollutants, phytoremediation strategies and the possible plants of choice. Besides highlighting the support roles played by soil fauna and flora, the fate of harvested biomass/dieback and its future prospects are also discussed. We further explored the factors challenging phytoremediation progress in Africa, amidst its promising potentials and applicability for sustainable ecosystem management paradigm.

The Niger Delta region of Nigeria is one of the most crude oil impacted deltas globally. The region has experienced over five decades of oil related contamination of the total environment (air, soil, water and biota). In 2011, UNEP released a seminal report on oil impact on Ogoniland environments, which up scaled demands for urgent clean up and restoration of degraded bio-resource rich environments of the Niger Delta, starting from Ogoniland. The Nigerian Government demonstrated renewed political will to remediate contaminated sites in Ogoniland with a launch of the clean-up exercise in June 2016. Stakeholders' expectations from the clean-up include not only environmental remediation but also restoration and creation of sustainable livelihood opportunities to reduce poverty in the region. Most studies have focused on the environmental restoration aspect and identified bioremediation as the likely appropriate remediation approach for Ogoniland, given its low environmental footprints, and low-cost burden on the weak and overstretched economy of Nigeria. This study mapped opportunities for sustainable livelihood creation during the Ogoniland remediation and restoration exercise. Given the value chain of bioremediation and its ancillary activities, the study analysed opportunities and mechanisms for skilled and unskilled job creation and prospects for sustainable livelihoods and knock-on effects. It is anticipated that the clean-up process would lead to economic prosperity and mitigate resource-driven conflicts in the Niger Delta. The study provides an exemplar for waste-to-wealth transformation in regions where natural resource mining has impacted communities, and has dislocated local economies and age-old livelihood structures.

Sites affected by petroleum hydrocarbons from oil exploitation activities have been identified as a major environmental and socio-economic problem in the Niger Delta region of Nigeria. The current Nigerian regulatory instruments to manage these contaminated sites are fragmented and the roles and responsibilities of government agencies, such as the Department for Petroleum Resources (DPR), and the National Oil Spill Detection and Response Agency (NOSDRA), are not well defined. This lack of coordination has led to ineffective land contamination policy and poor enforcement more generally. Appropriate, risk-based policy instruments are needed to improve regulatory capacity, and to enhance the regulator's ability to manage new and existing petroleum hydrocarbons contaminated sites. Lessons can be learned from countries like the United Kingdom (UK) and the United States America (USA) that have experience with the management and clean up of historically contaminated land. In this paper, we review the status of petroleum hydrocarbon contaminated sites management in Nigeria and identify the gaps in existing policy and regulation. We review the contaminated land policies and regulation from the UK and the USA, and identify lessons that could be transferred to the Nigerian system. Finally, we provide a series of recommendations (e.g. source – pathway-receptor approach, soil screening criteria, clean-up funding, liability) that could enhance contaminated land legislation in Nigeria.

Contamination of the total environment (air, soil, water and biota) by crude oil has become a paramount interest in the Niger Delta region of Nigeria. Studies have revealed variable impacts of oil toxicity on the environment and exposed populations. The revelation gained much international attention in 2011 with the release of Environmental Assessment of Ogoniland report by the United Nations Environment Programme (UNEP). This has up scaled local and international pressures for urgent clean-up and restoration of degraded bio-resource rich environments of the Niger Delta, starting from Ogoniland. Previous remediation attempts in the area had failed due to erroneous operational conclusions (such as conclusions by oil industry operators that the Niger Delta soil is covered by a layer of clay and as such oil percolation remains within the top soil and makes remediation by enhanced natural attenuation (RENA) suitable for the region) and the adoption of incompatible and ineffective approaches (i.e. RENA) for the complex and dynamic environments. Perennial conflicts, poor regulatory oversights and incoherent standards are also challenges. Following UNEP recommendations, the Federal Government of Nigeria recently commissioned the clean-up and remediation of Ogoniland project; it would be novel and trend setting. While UNEP outlined some measures of contaminated land remediation, no specific approach was identified to be most effective for the Niger Delta region. Resolving the technical dilemma and identified social impediments is the key success driver of the above project. In this paper, we reviewed the socio-economic and ecological impacts of contaminated land in the Niger Delta region and the global state-of-the-art remediation approaches. We use coastal environment clean-up case studies to demonstrate the effectiveness of bioremediation (sometimes in combination with other technologies) for remediating most of the polluted sites in the Niger Delta. Bioremediation should primarily be the preferred option considering its low greenhouse gas and environmental footprints, and low-cost burden on the weak and overstretched economy of Nigeria.

Over the past five decades, Nigeria has developed a number of contaminated land legislations to address the damage caused primarily by oil and gas exploitation activities. Within these legislations exists elements of risk assessment and risk-based corrective action. Despite this progress, we argue that contaminated land management approaches in Nigeria need further development to be able to integrate new scientific information, and to address environmental, economic, and social values. By comparison, advanced contaminated land regimes in the United Kingdom (UK), the Netherlands, Australia, New Zealand, and the United States of America (USA) apply a number of integrative approaches (e.g. sustainability appraisal, liability regime, funding mechanisms, technology demonstration) that enable them to meet the environmental, economic, and social needs of their populations. In comparison, Nigerian governance lacks many of these mechanisms and management of contaminated land is ad hoc. In this paper we propose an integrated risk assessment framework for Nigeria that incorporates the principles of sustainability and stakeholder engagement into the decision-making processes for contaminated land risk assessment and risk management. The integrated approach relies on transparency to promote acceptance and build trust in institutions, and uses stakeholder engagement to address data deficiencies. We conclude this paper with a roadmap for how Nigeria might implement such an integrative approach into their existing contaminated land regulatory system, as well as identify a series of policy priorities that should be addressed.