Earth’s atmosphere now has more carbon dioxide in it than it has in millions — and possibly tens of millions — of years, according to data released Thursday by the National Oceanic and Atmospheric ...

Earth as seen from the moon's orbit during the Apollo 8 mission in 1968, with updated color based on lunar and Earth observations. Credit: NASA At a federal research lab located at 11,135 feet (3,397 ...

Add Yahoo as a preferred source to see more of our stories on Google. Carbon dioxide may be a naturally occurring substance on Earth, but too much of its presence has contributed to global warming, ...

Scientists are worried because they can’t fully explain the big jump, but they think it might mean that carbon absorption by forests, fields, and wetlands is slowing down.