You have to distinguish between the scientists at NASA and the people who "adjust" and "spin" the data.

How about the "20 warmest years have occurred in the past 20 years" quote - did it occur to you that is also true is the temperature is declining as well? It's not false, but it's misleading - "spin".

http://rs79.vrx.net/opinions/ideas/climate/.images/annot-land_ocean.png

NASA points out warming has stopped but "spun" it to make you think warming is still happening

http://climate.nasa.gov/news/2241/

February 23, 2015 - "The past year was the warmest year on record, though their analysis has 2014 in a virtual tie with 2005 and 2010. "

When several years all tie for the warmest year it means temperature isn't increasing.

Remember in 2012 when the Greenland ice sheet melt freaked people out on 10,000 blogs? Look at the source:

http://www.nasa.gov/topics/earth/features/greenland-melt.html

"Satellites See Unprecedented Greenland Ice Sheet Surface Melt"

That's the headline. Now look at what the scientists actually said:

"Ice cores from Summit show that melting events of this type occur about once every 150 years on average. With the last one happening in 1889, this event is right on time," says Lora Koenig, a Goddard glaciologist and a member of the research team analyzing the satellite data."

If it's a cyclical event, it's not "unprecedented" is it?

If the world was cooling it would be late. In a warming world it would be early, thus the significance of "on time".

What was "unprecedented" was that satellite saw it.