[oasisbob]

The Bradford pear is a cultivar of an imported species from Asia.

Nothing about this tree growing in North America is "nature taking its course".

Humans decided to cultivate it here, and we can choose to stop. Cycles of correction, sure, but attempting to fix problems due to introduced species seems like a worthwhile effort.

[t-3]

Living things have been spreading to new areas and driving others to extinction and being driven extinct for the whole history of life. It's an extremely natural thing.

[skeledrew]

We will consider intervening in nature to be a "worthwhile effort" right up to the moment we finally make the planet 100% uninhabitable.