Planetary carbon dioxide concentrations are the highest they've been in the past 800,000 years, an ignominious milestone for Earth Day 2013. Still, the world is making some progress toward addressing global warming.
That's the good news heading into Cancun global warming talks Nov. 29. The bad news is that the carbon dioxide emissions aren't likely to stay down for long.
A new study recorded a slight dip in the amount of CO2 taken up over the past 10 years. If the trend continues, scientists say it could signal a tipping point in earth's ability to remove carbon dioxide from the atmosphere.
Researchers at the Copenhagen global warning talks say they're finding success in reducing emissions by encouraging tropical countries to protect their forests.
The Copenhagen summit on climate change is looking less likely to produce a binding CO2 emissions reduction agreement as a new study finds that global carbon dioxide emissions increased 29 percent in the past nine years.
Even if all the world's smokestacks and tailpipes were to suddenly stop spewing CO2, if all the trees everywhere were to be left standing, and if all the remaining coal, oil, and gas were to stay in the ground, the planet would still be feeling the effects of global warming a millennium from now.
Rather than a call to throw up one's hands in discouragement, the results show the importance of acting quickly to reduce emissions and so limit the very long-lived effects