Ask HN: Who's working making the world a better place?

Lots of us are making incremental improvements across various segments of the b2b and b2c markets. There are plenty of interesting and rewarding challenges in that space, and it's what I currently do as well. However, there must be some of us here who are working to better our world and future, but I don't seem to see much press for them here or anywhere for that matter.

To those of you in that camp: what's your company, what are you doing, and what are your growing pains?