The only way to make real difference for the better would be if all humanity changes its way of life, that is, begin to prioritize long term benefits instead of instant satisfaction. This primarily applies to those who have the power to decide on activities that affect millions of people; instead for every good idea that could help heal the planet (and make for humans better place to live) to say "it doesn.t pay off" they should embrace and fund projects in favor of renewable energy and recycling...
From one side, COVID19 has brought us temporary decrease in air pollution bur form the other, did you see what is happening with endless wasted masks, gloves and other protective accessories that millions of people are throwing away around the world? Just as we timidly begun with banishing one time use plastics, we have new issue but no one is talking about it.
Every crisis is opportunity for a change, for better or worse. I.m afraid that we didn.t learn much form this one...