You need to see the composition of the asteroid.
Bad gases in the air, like the smoke from cars. the trees filter that.
Renewable energy is energy that doesn't run out.Examples of these are wind and water. Nonrenewable energy sources are things like oil and coal—fossil fuels, because once they're gone, we're not getting them back. but we'll always have wind and water.
I would either answer sanitation(pollution) or corruption
