Land pollution, water pollution, space pollution, air pollution, animal extinction, excessive waste.
Signing the Green New Deal would help greatly with many things including air pollution.
Limit deforestation and protect our forests and animals. Charge public companies who throw their waste into the oceans, lakes and rivers. Remove many of the unnecessary dams that have been built across America that have detrimental effects on the environment and the animals that depend on those water sources. Charge companies like Monsanto for their chemical run offs. Create NASA programs that remove excess equipment that is no longer in service from space. Add back on all the regulations Trump rolled back in favor of capitalism and neoliberalism.
Teach minimalism and conservation in our schools.