We most likely already emitted enough carbon dioxide to kill all glaciers worldwide. Regions who depend on glacier melt for their water supply need to act now.
half the world relies on water from the Himalayas and the tibetan highlands. China, SEA(Vietnam, Laos, Cambodia, Thailand Myanmar) and South Asia all rely on glacial water for large scare agriculture
The only issue is pretty much all the good sites for a reservoir already have a reservoir by now. Whats left is expensive stuff like digging out underground reservoirs that you can imagine would take national support for a lot of places to achieve.
The oceans store plenty of water, we will just have to extract the salt. Ya, and build more reservoirs, poorer countries are going to get hit really hard.
Sun automatically extracts salt-free water via evaporation, then the vapor is conveniently carried by winds all over the world and literally rains from the sky.
At this point with the way political will is structured on this planet, the most direct way might be to overlay a satellite map of industrial emissions, drop leaflets to tell people not to show up to work, strike these targets, then argue you had no choice in front of the UN.
