Here is a real concern. Is it man made though?
 

The Greenland ice sheet is losing its mass faster than in previous years and
making an increasing contribution to sea level rise, a study has confirmed.

Published in the journal Science, it has also given scientists a clearer
view of why the sheet is shrinking.

The team used weather data, satellite readings and models of ice sheet
behavior to analyse the annual loss of 273 thousand million tonnes of ice.

Melting of the entire sheet would raise sea levels globally by about 7m
(20ft).


http://news.bbc.co.uk/2/hi/science/nature/8357537.stm

Here is a real concern. Is it man made though?
 

On 13/11/2009 4:53 PM, Jonno wrote:
The Greenland ice sheet is losing its mass faster than in previous years
and making an increasing contribution to sea level rise, a study has
confirmed.

Published in the journal Science, it has also given scientists a clearer
view of why the sheet is shrinking.

The team used weather data, satellite readings and models of ice sheet
behavior to analyse the annual loss of 273 thousand million tonnes of ice.

Melting of the entire sheet would raise sea levels globally by about 7m
(20ft).


http://news.bbc.co.uk/2/hi/science/nature/8357537.stm
See this and how complicated it has become.
Various articles on science from a non skeptical site.
http://www.guardian.co.uk/science/series/science