This chapter examines the ways that environmental issues affect human rights and the relevance of human rights to environmental campaigns. It also evaluates proposals for extending human rights to cover environmental rights, rights for future generations, and rights for some non-human animals. The chapter begins with a discussion of the relationship between human rights and the environment, along with the notion that all persons have ‘environmental human rights’. It then analyses the impact of the environment on human security and its implications for human rights issues before considering case studies that illustrate how environmental issues directly impact on the human rights of the so-called environmental refugees, who are displaced from lands by the threat of climate change and also by development projects. Finally, the chapter describes the link between human rights and environmental sustainability.