https://www.wikiwand.com/en/Voluntary_Human_Extinction_Movem...
Helping the Earth is very, very high on Maslow's pyramid, just appreciate that you are that high on it and think how to bring more people at thay level.
Plagues and wars cannot help the environment, but the bettering of the condition of man kind can, and is the only way forward.
In order to help the Earth, we first have to help man kind.
a) you keep the human population minuscule, at a primitive techonlogical level
b) you completely wipe out all humans
c) humans become so advanced they transcede their natural limitations
Unfortunately every major problem humanity faces today can be solved with properly targeted elimination of mass of people.
Covid has massive painful ramifications throughout the world population and economy.
Surely we can do better than a plague to save the Earth.
This will most likely be over in a year or two after massive vaccinations and synthetic antibodies, but the economic impact will linger for a loot longer.
And guess what will happen when this is over and the world wakes up in a major economic crisis -- that's right, the world won't give a damn about the environment, it will all be about efforts to restart the world economy and cleanup the fallout.
I'd rather have vaccines.