Most of the pollution found here in the U.S. is from local sources, and only a small portion is brought here from other countries.
Hurricane Katrina damaged 320 million large trees which led to massive quantities of carbon dioxide being released into the atmosphere.
A team of NASA and university scientists has detected an ongoing reversal in Arctic Ocean circulation triggered by atmospheric circulation changes that vary on decade-long time scales.
The Rosetta spacecraft zoomed past Earth at 12:57 p.m. Pacific Time today, picking up speed for its planned 2014 rendezvous with a comet. JPL manages NASA's contribution to the European Space Agency's 3.3-ton comet chaser.
The tropical Pacific Ocean remains in the grips of a cool La Niña, as shown by new data of sea-level heights from mid-October of 2007, collected by the U.S-French Jason altimetric satellite.
The rare tropical depression called "05A" in the Arabian Sea was hanging near the southern coast of Oman on Nov. 1 and 2, but forecasters expect it to fade over northeast Yemen over the weekend.
As Tropical Storm Noel churns off Florida's east coast, NASA and university scientists have announced they have developed a promising new technique for estimating the intensity of tropical cyclones from space.
A high-tech NASA research airplane is helping firefighters in Southern California get better up-to-the-minute information about the status of the blazes they face.
Powerful Santa Ana winds have fueled more than 10 large wildfires throughout Southern California, stretching from Santa Barbara to San Diego.
NASA data reveal the extent of the hole in 2007 was about average when compared to measurements from the last few decades.