Scientists are hoping for a new perspective on the long-standing mystery with a NASA satellite that will, for the first time, make carbon dioxide measurements globally from space.
The average level of CO2 in the atmosphere hits an unwelcome milestone.
Worried scientists said Sunday they had found four new ozone-destroying gases in the atmosphere, most likely put there by humans in the last 50-odd years despite a ban on these dangerous compounds.
See the polar vortex in action as it sank the States into a big freeze in January.
A new NASA Earth Observatory map shows deadly exposure to air pollution worldwide. Continue reading →
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