Adaptation Clearinghouse (Georgetown Law Center), which has archived and reposted numerous U.S. government resources on climate change adaptation.
Way Back Machine (project of Internet Archive, a non-profit library of books, music, films, and websites). This site requires knowing the URL you’re looking for, but its beta site has a search function that easily found the Obama PCAP.
While I don’t see documents at this site, Environmental Data & Governance Initiative pulls back the curtain on the energy and time being invested into archiving public environmental data.
If you’re looking for current Trump Administration actions on climate change, I recommend using the following sites:
Climate Deregulation Tracker (Columbia Law School Sabin Center for CC Law), which is monitoring “steps taken by the incoming administration to scale back or wholly eliminate federal climate mitigation and adaptation measures” along with “congressional efforts to repeal statutory provisions, regulations, and guidance pertaining to climate change.”
NRDC (National Resources Defense Council) has created a Trump Watch to “keep a vigilant eye on the administration’s environmental actions.”
Track Trump is tracking “policies put into place by the Trump administration” during its first 100 days by category of Trump’s “Contract with the American Voter” pledges.
If you have suggestions for sites to add to this list, please email me at firstname.lastname@example.org.