3. Are sea levels rising?
Increases in sea level have tracked strongly with human activity. We started burning fossil fuel during the Industrial Revolution (1760-1850), and our use of coal, oil, and natural gas has increased every year. Sea levels, in response to steadily warming temperatures, also rose steadily.
Unfortunately, the sea level projections don't look like a straight line. It looks like an upward sloping curve. Sea levels aren't increasing at the same rate every year — thatrate is increasing.
At present, sea levels are projected to rise by as much as 3 feet by 2100.
With the planet's ice reserves falling into the oceans faster than humanity has ever seen,the excess water has to go somewhere. 1.6 million people live in the islands scattered across the Pacific (3 million, if you count Hawaii), and they are all in danger of slowly losing their homelands.
But rising sea levels won't just affect faceless people of nations you've never heard of that you don't pronounce correctly (like Kiribati).
Ever heard that saying "A rising tide lifts all boats"? Let's revise that: "A rising tide sinks all coastal communities."
Nearly 40% of Americans live in a coastal county.
Rising sea levels could make significant portions of New York City unlivable.
4. Have recent heat waves been more intense?