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Concrete is the most highly used construction material globally. This is largely due to its durability, versatility and manufacture from inexpensive and readily available materials. Although concrete has become an essential and ubiquitous construction material for modern society, its use has significant environmental impacts. The full cement and concrete lifecycle, from production to final disposal, accounts for nearly 10% of global energy-related CO2 emissions with the majority of these emissions produced from cement, which is the binding material that holds concrete together. The cement and concrete industry (CCI), which is integral to global infrastructure development, is therefore confronted with a growing need to decarbonize its operations and products, as well as to support the decarbonization of associated end-user sectors. This paper provides a systematic and critical review of more than 800 studies to highlight ways in which the CCI can decarbonize. A socio-technical perspective is used to understand the full range of industrial and economic activities where a decarbonized paradigm for cement and concrete production is relevant. This perspective is further used to assess key technical, economic, social and political factors that will drive a net-zero transition in the CCI over the long term.

Ceramics are considered one of the greatest and earliest most useful successes of humankind. However, ceramics can be highly damaging to natural and social systems during their lifecycle, from material extraction to waste handling. For example, each year in the EU, the manufacture of ceramics (e.g., refractories, wall and floor tiles and bricks and roof tile) emit 19 Mt CO2, while globally, bricks manufacturing is responsible for 2.7% of carbon emissions annually. This critical and systematic review seeks to identify alternatives to mitigate the climate effects of ceramics products and processes to make their lifecycle more sustainable. This article reviews 324 studies to answer the following questions: what are the main determinants of energy and carbon emissions emerging from the ceramics industry? What benefits will this industry amass from adopting more low-carbon processes in manufacturing their products, and what barriers will need to be tackled? We employ a sociotechnical approach to answer these questions, identify barriers to decarbonise the ceramics industry, and present promising avenues for future research. In doing so, we show that environmental and energy challenges associated with the ceramics industry are not just limited to the manufacturing stage but also relate to the extraction of raw materials, waste disposal, and landfilling.

We conduct a comprehensive mapping and cost analysis of the renewable energy (RE) technology options available to the United Arab Emirate’s (UAE) energy system. Based on projected demand and the true (unsubsidized) costs of fossil fuel supply, the substitution cost of each option and its respective potential is estimated. We demonstrate that a significant acceleration of the existing RE plans can be achieved with positive economic benefits for a number of options – before accounting for health and environmental benefits, or new opportunities for hydrocarbon exports – and that the full portfolio can be completed at a cost that is less than 1 US Dollar (USD) per gigajoule (GJ) when accounting for the avoided subsidies by 2030. Growing opportunity cost of gas, falling solar prices and abundant solar resources are the biggest drivers behind these results. Cumulatively implementation of these options results in RE contributing to 10% of UAE’s total final energy consumption in 2030. This achievement, seen in the context of the global effort to increase renewable energy penetration, is relatively limited, but the rates of increase in RE deployment are actually among the highest internationally given the low starting point and the unavailability of traditional RE sources (biomass and hydro) in the UAE. Moreover, they herald the implications of RE’s rapid shift to cost-competitiveness in a country like the UAE.