Here is the quickest, most effective thing we can do to help save the planet. Stop destroying it with our investments.
Did you know that your savings are probably being used by your bank to finance Big Oil and destroy the environment? Spend five minutes reading this article. Rate your current bank. Switch to banks such as Aspiration in the US or Westpac globally. These banks give you a better rate of return, and will not support unsustainability-- plus they donate as much as 10 percent of revenue to environmental causes! (And no-- we don't get a kickback from them for referring you.)