The original earth day was political.
http://www.earthday.org/about/the-history-of-earth-day/
It wasn’t scientific-- because the scientists who worked for DOW, and the scientists who worked for Los Alamos, and the scientists who worked for big business-- weren’t all that interested in what the biologists, ecologists, and conservationists might have to say.
Now the tables have turned, and in a sense, science is pretty firmly on the side of the environmentalists. And rather than listen to this scientific understanding of the world, people such as trump have chosen to denigrate the process itself.