Ice (Glacial) Melting - A reason to worry for future generations.

http://wickershamsconscience.wordpress.com/2014/12/07/134-billion-metric-tons-per-year/

The human imagination has a hard time wrapping around really big numbers and really big sizes. But let’s try.
Imagine an iceberg that is one cubic mile in size: a mile high, wide and deep. It’s an almost unimaginably huge chunk of ice, and it weighs a little more than 3.8 billion metric tons. For scale, the very large iceberg in the photo, according to ship’s radar, was about 350 feet high.

147,197,952,000	cubic feet
57	pounds per cubic foot of ice
8,419,722,854,400	pounds
2,205	pounds per metric ton
3,819,161,233	metric tons

In Antarctica, on an annual basis, more than almost three such gigantic icebergs are melting each and every month. Each year, Antarctica suffers a net ice loss of 134 billion metric tons (paywall). That’s 11.2 billion metric tons a month. That’s 2.9 icebergs a cubic mile in size.