So, do you even know how you could do this, assuming you desire to do this enough to actually do something?

Of course. Cut down on driving, and when driving adopt more fuel efficent patterns. Lower the thermostat a few degrees. Cut down on plastics use. Buy local foods when possible. Many others.

And I am doing some of these things, though I will be doing more.

You are delusional when you think that there will be no ill consequences - many ill consequences have already occured.

The northern migration of the mountain pine beetle has devastated millions of acres of forest in BC. The migration was possible because there haven't been any winters with prolonged very cold temperatures for many years.

Just one of many.