Are there any well funded tech startups / companies tackling major societal problems?

Any of these fair game: https://en.wikipedia.org/wiki/List_of_global_issues

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I don't see or hear of any and want to know if this is just my bias or if there really is a shortage of resources in tech being allocated to solving the worlds most important problems.

Ran into this previous Ask HN (https://news.ycombinator.com/item?id=24168902) that asked a similar question. However, here I wanna focus on the better funded efforts (not side projects, philanthropy etc).

Only example I've heard so far is Tesla. Any others?