PBS News Hour: on Energy & Oil

Steve Bullock: Re-enter Paris climate agreement

Eric Swalwell: Support for Green New Deal and Paris climate accord

Beto O`Rourke: Return to Paris climate agreement

• O'Rourke would return the U.S. to the international Paris climate accord, under which the U.S. pledged to cut greenhouse gas emissions 26 to 28 percent by the year 2025.
• In general, O'Rourke focuses on the economic potential of renewable fuels and the economic hazards of not addressing climate change.
• It is unclear if he supports deeper carbon emissions cuts or a carbon tax.
• He would allow fracking, but with tighter oversight.

Amy Klobuchar: Rejoin Paris climate deal; meet UN goals

• Climate change: Set goals for cutting greenhouse emissions and rejoin Paris climate deal.
• Klobuchar wants to meet the goals of the U.N. panel on climate change: cut greenhouse gases by 45 percent by 2030, and increase renewable energy by up to 47 percent by 2050.
• She has not given specifics recently on how she would achieve those goals.
• But in 2008, Klobuchar pushed for a bill to cut emissions 70 percent by the year 2050 via a cap-and-trade market system.
• Klobuchar would also rejoin the Paris accord and push to set national guidelines to boost renewable fuel use.

Kamala Harris: Don't withdraw from the Paris climate accord

• California's attorney general, Harris launched an investigation into Exxon Mobil in 2016, after reports that the oil and gas giant lied for decades about the risks of climate change.
• Harris criticized President Donald Trump's decision to withdraw from the Paris climate accord.
• Additionally, Harris opposed the Trump administration's proposal to reverse Obama-era fuel efficiency standards for cars and light trucks.

Elizabeth Warren: Supports the idea of a Green New Deal

• Climate change: Supports reducing greenhouse gas emissions.
• Warren favors forcing public companies to report their greenhouse gas emissions and any potential effects climate change might have on their businesses.
• She also supports "the idea of a Green New Deal," a broad package of proposals floated by some Democrats and environmental groups aimed at taking action against climate change.
• But while Warren fielded questions from voters about climate change at an Iowa event this month, she did not focus on the issue the day she announced she was forming a presidential exploratory committee.

Kirsten Gillibrand: Limit then cap-and-trade carbon emissions

• Climate change: Create a cap-and-trade commodity market for carbon emissions. Ban new drilling on federal lands.
• Writing in the Wall Street Journal in 2009, Gillibrand proposed establishing a cap-and-trade commodity market to mandate a limit on carbon emissions and allow businesses to trade their emissions allowances as commodities.
• In addition, she has proposed the "Keep it in the Ground Act," which would ban any new leases for gas or oil drilling on federal lands.

Tulsi Gabbard: No more fossil fuels for electricity by 2050

Julian Castro: Rejoin the Paris Climate Treaty

Castro has criticized President Donald Trump for withdrawing from the Paris climate change accord.
• Castro's overall approach in public office was to try to convince businesses to increase their reliance on renewable energy voluntarily.
• While he was mayor of San Antonio, the local utility committed to close a coal plant and embrace a 20 percent renewables goal.
• It is not clear if Castro supports a carbon tax or "cap and trade" policy to reduce carbon emissions.