One thing the Foundation could do to help with climate change and water issues other than move office locations, and which is on topic because the Foundation has chosen to purchase renewable energy through contracting with suppliers in the past, is if the Foundation attempted to secure desalinated water from electrodialysis through contracting with San Francisco Public Utilities:
https://drive.google.com/open?id=0B73LgocyHQnfV1Q4VE45RmFFeFlPSDlKalctVS1nRl...
There are two benefits: first, electrodialysis is much less expensive than reverse osmosis, in which almost all existing desalination companies have a huge amount of institutional inertia-causing investments of expert personnel, time, money, tooling, and effort; secondly, the same process can directly remove carbon from seawater:
http://talknicer.com/co2extraction.pdf
That is the least expensive method of removing carbon from the atmosphere other than collecting it at the smokestack, flare, exhaust, and tailpipe. And it pays for itself because it produces fresh water as a side effect.