This paper by Lawyers Committee on Nuclear Policy, sponsored by The Simons Foundation Canada, explores the increasing challenges posed by climate change and nuclear weapons. "Nuclear weapon possessors are modernizing their arsenals and in some cases increasing them. US-Russian nuclear arms control negotiations have stalled, and multilateral nuclear disarmament negotiations are non-existent. The Russian invasion of Ukraine and the strong international reaction against it has severely disrupted already tenuous cooperation among major powers on matters of peace and disarmament. And, of course, climate change has grown impossible to ignore. A recent IPCC report cites an all-but-unavoidable increase in global temperatures, sparking worldwide climate disasters we are already seeing: raging fires, harsher hurricanes, flash flooding, and more."