Policy based on the environment has been fluctuating significantly through recent history. Up until a few years ago, many people still genuinely did not believe in the process of climate change and the effect of mankind on the planet. While some people are still hesitant to believe that climate change is as important of a topic scientists are mostly at a consensus that climate change is real and an imminent threat to the planet.
Illinois Mathematics and Science Academy, "08. Environmental Policy and Activism" (2019). EnACT. 18.