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But beneath the rosy narrative that describes natural gas as a transition fuel lies a more complex story. Gas is associated with health and environmental hazards and reduced social welfare at every stage of its life cycle.

William Ruckelshaus was a conservationist, an Indiana Republican conservative who believed in conserving balanced budgets, limited government powers, constitutional checks and balances, and clean air and water.

"Nature provides a free lunch," he said, "but only if we control our appetites."

Peter Dykstra and Bobby Bascomb take a look at how melting sea ice in the Arctic is already opening up a new shipping route for oil and gas in particular. Then, the two discuss the low attendance by Democratic candidates at the first ever Presidential Forum on Environmental Justice, and some of the big ideas from the candidates who showed up.