Planet EarthScienceUrban Living Is Kinder to the Planet Than the Suburban LifestyleScienceCounterpoint: Dangers of Focusing Solely on Climate ChangeScienceDon't Buy That New Prius! Test-Drive a Used Car InsteadScienceSurprise! Conventional Agriculture Can Be Easier on the PlanetScienceSuperefficient Frankencrops Could Put a Real Dent in Greenhouse Gas EmissionsScienceWanna Harvest Power From the Sea? You'll Have to Test It Here FirstScienceAir-Conditioning Actually Emits Less C02 Than HeatingScienceCarbon Credits Were a Great Idea, But the Benefits Are IllusoryScienceThe People's Republic Leads the Way in Alternative-Energy HardwareScienceClimate Change Is Inevitable. Get Used to ItScienceClive Thompson on How Man-Made Noise May Be Altering Earth's EcologyScienceGoogle-Backed Solar Startup Picks Up Steam, $130 MillionSciencePeak Water: Aquifers and Rivers Are Running Dry. How Three Regions Are CopingScienceScientists Want Your MacBook for Earthquake DetectionScienceHydrogen Sulfide May Kill Us, Bring Us Back to LifeScienceWe've Been Changing the Climate for Eons, and That's Reason for HopeScienceThe Environmental Defense Fund's Fred Krupp on the Best Capitalist Climate SolutionsScienceThe Last Great LandgrabScienceForeigners Keep Out! High Tech Mapping Starts to Redefine International BordersScienceThe Best: Extinct Animals, From an Elephant Bird to a 10-Foot-Long, Four-Eyed SpiderScienceRussia Contests Borders with Canada, Denmark, and the United StatesScienceEcotopias Aren't Just for Hippies Anymore — and They're Sprouting Up WorldwideScienceScientist Employs 'Circuit Theory' to Protect Endangered SpeciesScienceTouring a Salty, Creepy Nuclear-Waste FacilityMore Stories