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Obama Orders Government to Cut Greenhouse Gases
OBAMA: CUTTING GREENHOUSE GAS EMISSIONS
Obama Targets Greenhouse Gases, Fuel Efficiency
Obama unveils US plan to cut carbon emissions
Obama unveils Power Plan to cut greenhouse gas emissions
Obama Outlines Ambitious Plan to Cut Greenhouse Gases
Obama announces greenhouse gas reduction plan
Trump v. Obama on Greenhouse Gas Emissions | The New York Times
President Obama takes steps towards allowing Calif. and other states to target greenhouse gases thro
Obama to Unveil Plan to Combat Climate Change
Trump's executive order dismantles Obama's environmental protection effort
President Obama Speaks on Energy and Climate Change
