Emissions reduction

FILE - In this April 17, 2014, photo shows the Pancake Rocks in Greymouth, New Zealand. New Zealand lawmakers have joined together across the aisle to pass a bill aimed at combating climate change. The Zero Carbon bill aims to make New Zealand reduce its greenhouse gas emissions to the point the country becomes mostly carbon neutral by 2050. (AP Photo/Carey J. Williams, File)

Activists of the environment protection organisation 'Greenpeace' take part in a protest rally in front of the administrative court in Berlin, Germany, Thursday, Oct. 31, 2019. Three German farming families are taking Chancellor Angela Merkel to court, arguing that her government isn't doing enough to tackle climate change. The lawsuit that will be heard Thursday is the first attempt in Germany to hold authorities legally accountable for pledges they have made to reduce greenhouse gas emissions. Slogan reads: 'You are sueing for everybody - we stay next to you'. (AP Photo/Michael Sohn)

FILE- In this Nov. 6, 2018 file photo, Democratic Senate candidate, former Gov. Phil Bredesen speaks to supporters after he conceded to Rep. Marsha Blackburn, R-Tenn., in their race for the U.S. Senate in Nashville, Tenn., as his wife Andrea Conte stands next to him. A new business venture by Bredesen takes on global warming by helping companies fund solar panels in communities with dirty-power electric grids. The Democrat plans to introduce Clearloop on Tuesday, Oct. 22, 2019, at a conference headlined by former New York Mayor Michael Bloomberg. It's Bredesen's first big public foray since losing a U.S. Senate bid last year. (AP Photo/Mark Zaleski, File)

Protesting farmers gather in The Hague, Netherlands, Wednesday, Oct. 16, 2019. Thousands of Dutch farmers protest over the Netherlands efforts to drastically reduce emissions of greenhouse gases. Among the farmers' demands are that the government does not further reduce the number of animals they can keep. (AP Photo/Peter Dejong)

Tractors driven by protesting farmers line up and block the road during a protest in The Hague, Netherlands, Tuesday, Oct. 1, 2019. Thousands of Dutch farmers headed to the city on Tuesday, many driving in slow-moving convoys of tractors that snarled traffic in the morning rush hour, for a national day of protest to demand more respect for their profession. (AP Photo/Mike Corder)

A woman gestures as she speaks with riot police officers during a yellow vests demonstration, in Paris, Saturday, Sept 21. 2019. Paris police have used tear gas to disperse anti-government demonstrators who try to revive the yellow vest movement in protest at perceived economic injustice and French President Emmanuel Macron's government. The French capital was placed under high security as few hundred anti-government protesters started marching in the Paris streets. (AP Photo/Kamil Zihnioglu)

Climate change activists participate in an environmental demonstration as part of a global youth-led day of action, Friday Sept. 20, 2019, in New York. A wave of climate change protests swept across the globe Friday, with hundreds of thousands of young people sending a message to leaders headed for a U.N. summit: The warming world can't wait for action. (AP Photo/Bebeto Matthews)

President Donald Trump boards Air Force One at Marine Corps Air Station Miramar, Wednesday, Sept. 18, 2019, in San Diego, Calif. (AP Photo/Evan Vucci)