https://www.nrdc.org/joinGive/join/basic.asp
If the government of the USA is not going to protect our environment anymore, then it's going to have to be groups like the excellent NRDC that will have to do it. Please consider joining, even if only with the lowest amount of donation (more if you can afford it). It's crucial.
If you can't join, then consider doing more in your daily life; recycle more, think about
composting, buy a more efficient car the next time you buy a new one, use compact fluorescent lightbulbs, use less electricity and water.
Do something!