Do you have a reference for that 50C summer within the century or is it just made up? It's way higher than I've heard of unless they'll live in a place that's already getting almost that hot anyway - in which case they can obviously already cope so it doesn't matter.
It's very hot in Florida where I live, but I have 0 expectations that the company I work at could have any measurable impact on a global issue of this magnitude, and Amazon doesn't get much closer.
I disagree. If everybody held the opinion that their actions wouldn't amount to anything, nothing would ever change. Climate change is the single largest event that will occur in our lifetimes, and we all need to help pitch in to stop the raise in global temperatures.
Amazon definitely could. Silicon Valley, as a whole? Definitely absolutely could.