This chapter serves as a basic introduction to environmental justice. It begins by giving some historical background to the emergence of the term “environmental justice”. It then moves on to explain environmental justice as a movement concerned with the disproportionate burdening of communities of colour with environmental ills. This history is grounded in the lived experiences and realities of the communities experiencing environmental injustice, and as such examines various forms of resistance enacted by those communities to realize environmental justice. Finally, this chapter examines the ways in which making space for diverse and rich environmental histories, heritages, and identities is a crucial aspect of moving our global community toward the realization of environmental justice for all.