The environet is composed of topics, and the topics are marked by “environment words”. “Environment words” is itself an open cata logue, and a matter of interpretation. But any environment word list would have to include the topic markers of this chapter: resources and energy; population; biodiversity, species, rainforest. The next chapter’s markers are as central to the environment catalogue: pol lution, global warming, climate change and greenhouse effect; sus tainable development and sustainability; Gaia, Earth, planet, globe. Around these words spiral many arguments of environment.