Environmental concerns are important items on the political and economic agendas of most countries, whether developed or developing. In a world conscious of its environmental problems, studies in this domain have become an established discipline. Every new branch of science needs to define relevant terms to be used through the medium of language.

This dictionary contains terms covering the following fields and subfields: air pollution, biological diversity, biomass energy, biosafety, biotechnology, climate change, coastal environment, deforestation, desertification, endangered species, energy conservation, environmental economics, environmental impact assessment, forest conservation, freshwater pollution, global warming, greenhouse gases, human settlements, living marine resources, marine environment, mountain ecosystems, ozone layer, resources management, soil degradation, sustainable development, tropical ecosystem, wetland ecosystem.