Bret Victor wrote an article about this a few years ago - a lot of it is still relevant: http://worrydream.com/ClimateChange/

Building compelling telepresence experiences e.g. in VR could be a surprisingly effective way to help towards decreasing air travel, which is the largest energy use/emission category for people like us -- not taking a single transatlantic return trip probably matters more than anything else you can do at home.

That is an interesting idea, thanks.

Utility companies, look for "smart grid" or "distributed generation" projects/roles within them.