Fossil fuel companies knew about global warming since at least the 1970s. Those companies have used their enormous wealth to reverse trends towards public transit (e.g. Los Angeles used to have street cars...), halt the green energy transition until very recently, and spread misinformation and buy politicians.
Edit: also think about how all of those oil spills, mountain top removal, air and water pollution, cancers, asthma, heart disease that were "necessary for the economy" over the past couple of decades. When instead we could have already had fully sustainable energy systems with similar economic growth. Vote for politicians willing to do something about it.