Even "bad for life" is questionable, because despite our best efforts we haven't figured out how to sterilize the whole planet.
Anything we're doing that harms the environment harms _the environment we (and many other species) need to survive_.
If we continue to do so, we (and many other species) will die; much faster than this would happen "naturally".
But life will adapt and go on.
We're really only doing harm to ourselves.