Great question, Betty! I share your disappointment for Trump's decision; and especially now, everyday should be a day when we should think about the environment.
Problems cannot be solved at the same level of awareness that created them.
— Albert Einstein
If you haven't already, I recommend a watching of the film Before the Flood to understand, and appreciate the very real consequences of the climate change — like this one: a 3-4°C global temperature rise will make many parts of the world uninhabitable.
There is a lot of bad news in the movie, and there are a lot of issues that need to be solved, before any future crises can be averted; but as Obama tells DiCaprio, in the movie:
If we keep pushing, keep prodding, and most importantly keep educating the public there's no reason why we can't solve this problem in time.
We can only do that if we understand the underlying facts and figures. There are excellent resources on the internet (apart from the above film) which will help you do that! Here are a couple of my favourites:
I feel a need to include a former discussion here — things that you could do as a programmer, to strive to be more eco-friendly...
Jr. Application Developer | CS graduate | Passionate coder | Problem solver