The New Republic

BP has capped its leaking Macondo well, but that doesn't mean oil spills are now a thing of the past. Up in Michigan, a million gallons of crude have sloshed out of a pipeline into the Kalamazoo River. Governor Granholm has already declared the region a disaster area—and this may turn into the worst oil leak ever in the Midwest. READ MORE >>

Carbon-dioxide is certainly the highest-profile greenhouse gas out there, but it's hardly the only one. There are also, for instance, hydrofluorocarbons (HFCs), which are used to make refrigerants and have become a popular substitute for ozone-layer-destroying CFCs, which have been phased out under the 1989 Montreal Protocol. HFCs don't chew through the ozone layer, but they do warm the planet—some types are thousands of times more effective at trapping heat than CO2. READ MORE >>