I guess that would be the question of the century?

...

But as far as I know is that only in the USA since the year 1600 ... 91% of the total landmass of virgin forests on the territory of that country was cut down.

And also... most of the rivers that where deviated and constrained with dams, started during and after that time...

And also 7 billion people... Cars & machines happened in agriculture... I guess if we destroy all the cars we can clean this planet very fast?