My mentality is, do what you can, when you can. It seems overwhelming, because it is and it isn’t just on you to control. It is mostly on the world governments and corporations to actually start initiatives to stop this from getting worse, and then actually get better later on.
You, yourself, cannot du much to influence change, and your impact with the things you choose to do to help, honestly won’t help much in the grand scheme of things unfortunately.
So recycle, get a hybrid, or electric car when you can. Contribute to organizations that support the cause but don’t stress about what you can do in the short term.