Take this seriously.
Climate change: scientists warn it may be too late to save the ice caps | Climate change,

A critical meltdown of ice sheets and severe sea level rise could be inevitable because of global warming, the world’s scientists are preparing to warn their governments. New studies of Greenland and Antarctica have forced a UN expert panel to conclude there is a 50% chance that widespread ice sheet loss “may no longer be avoided” because of greenhouse gases in the atmosphere.
Such melting would raise sea levels by four to six metres, the scientists say. It would cause “major changes in coastline and inundation of low-lying areas” and require “costly and challenging” efforts to move millions of people and infrastructure from vulnerable areas. The previous official line, issued in 2001, was that the chance of such an event was “not well known, but probably very low”.

Translating for Americans: four to six “metres” is about 13 to 20 feet. This report says the oceans WILL rise. EVERY coastal city in the world WILL be another New Orleans. Take this seriously.
Two weeks ago I was at a meeting of a committee of the City of Menlo Park, where they were discussing whether to join the Mayor’s Climate Protection Agreement. This is an attempt to bypass the Republican-controlled federal government and start working to reduce carbon emissions. I suggested that if they want to move this idea along, they should distribute maps showing which parts of Menlo Park will be underwater and when. (Menlo Park is on the San Francisco Bay.)
YOU, yes, YOU can help by checking whether YOUR city is part of the Mayor’s Climate Protection Agreement. If they are, ask how you can help. If they are not, start working to get them to join up.