Things to Do

There are many lists of ways to save the environment or fight climate change at your fingertips with internet search, so I'll keep this short.

Every Gram of CO2, Methane, and Nitrous Oxide Counts

People rightly say that we are not going to prevent or reverse enough of climate change by individual, family or small group choices alone. But we cannot get there without better individual choices either, as noted by Politico. If we as individuals cannot take the smallest right steps, like shutting off a parked car or skipping meat at some meals, we will not be gaining the strength to make the larger adjustments, either. The clock runs both ways, although it is presently far overbalanced one way. Every gram put in to the atmosphere will be there until it is removed by photosynthesis or other processes, contributing a tiny fraction to the total problem. Catastrophes occupy a sort of logarithmic scale - we may already be in for a catastrophe of magnitude around, say, 10. But we are perhaps not yet in for a catastrophe of magnitude 100,000. We cannot really know, given the staggering scale and complexity of the Earth's biosphere-atmosphere-ocean systems, what precisely the future holds, so we need to give all possible effort to hitting the brakes.

Politics & Social Change

I am no expert on political action, but I will note that calling your congress-people or senators on the phone is said to be a much stronger tactic than signing digital petitions and sending form emails. You can also call your mayors, state legislators, governors, city council-persons, or whatever-titled persons of influence or power, executives, thought leaders, office holders, or ministers you have in your patch of the globe.

Things Not to Do:

It is not necessary or desirable to pin hopes on as yet unrealized, possibly never to be feasible, technologies such as Carbon Capture and Storage or Geoengineering. As noted by Vox.