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The global demand for energy and food generates, both in the countryside and in the city, environmental impacts, and many of these are due to the poor disposal of organic waste. One way to minimize these impacts on the environment is to carry out the treatment of waste generated in the various sectors. Among the possibilities for treating organic waste is anaerobic digestion. As a result of this process, there is the production of biogas, which is composed of several gases, including methane and carbon dioxide as the main ones. Biogas has energy potential, being able to generate electrical and thermal energy, in addition to being used in the form of biomethane. With the diversity of energy applications and the possibility of reducing waste, both anaerobic digestion and biogas contribute to the implementation and application of the Sustainable Development Goals (SDGs). These goals have a wide scope, ranging from the need for basic sanitation, clean and accessible energy for all, sustainable cities and communities, responsible consumption, to actions against global climate change, through the reduction of greenhouse gases. In this context, the objective of this work is to relate the SDGs and the anaerobic digestion of organic waste projects, which contribute both to the significant improvement of a community or region, as well as to environmental, social, and economic issues. The methodology used was the analysis of the concepts served by the use of the anaerobic digestion system in accordance with the objectives, goals, and sub-targets of the SDGs. Thus, the interrelation of at least five SDGs was observed: 6, 7, 11, 12, and 13. In summary, the use of anaerobic systems with the use of biogas helps in the substitution and/or reduction of energy sources not renewable resources, which can be applied both in the city and in the countryside, promoting a better quality of life for all. [ABSTRACT FROM AUTHOR]

Purpose: to estimate the incidence and prevalence of hearing loss suggestive of Noise Induced Hearing Loss and its association with age and time of service in metallurgical industrial pole workers in Manaus. Methods: cross-sectional study in workers who underwent audiometric testing periodical in 2012, totaling 1499 subjects. To estimate the incidence were selected 763 audiometrys with normal hearing at the reference testing and after compared with the current audiometry. Statistical analyses were performed using measures of central tendency, dispersion and frequency distributions. To verify statistically significant differences, we used the chi-square test, with significance level (p ⩽ 0.05). Results: the prevalence of hearing loss was estimated at 44.23% and 28.89% suggestive of Noise Induced Hearing Loss. There was a higher prevalence of hearing loss among workers aged from 45 years and time of service exceeding 21 years. Only 11.1% of workers over 21 years of service have normal hearing and 61.9% loss of these features suggestive of Noise Induced Hearing Loss. The classification of Not Suggestive of Noise Induced Hearing Loss remains stable in individuals below 20 years of occupational exposure (14.9%), and in people exposed to more than 20 years, increases to 27%. The incidence of hearing loss was 28% and within this total, 19.7% were suggestive of Noise Induced Hearing Loss. Most hearing loss, both suggestive of Noise Induced Hearing Loss, or not, were classified in light. Conclusion: the prevalence and incidence of hearing loss increased with age and time of service. Companies should strive to implement Hearing Conservation Program to minimize these losses. [ABSTRACT FROM AUTHOR]