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The abundant fossil fuel is helping reduce greenhouse-gas emissions, but not enough to prevent a climate crisis.
Republicans and free-traders are conflicted about lifting the crude-oil export ban.
Major pieces of the president's environmental program and foreign policy have been enabled by the oil-and-gas boom.
In cities and towns across Colorado, "fractivists" worried about air and water are taking on the booming oil and gas industry.
The world's largest solar project will be lighting up 140,000 California homes by next year.
Traits ingrained in the basic human condition may be preventing people from supporting more action against climate change.
Many people in and out of Washington wonder if we need a national energy plan. The fact is, we already have one.