Sen. Bernie Sanders has unveiled a plan for climate change, an issue he calls "the single greatest threat facing our planet," in which he wants to reduce U.S. carbon pollution by 40 percent by 2030 and by more than 80 percent by 2050. The Democratic candidate for the U.S. presidency hopes to meet his target by taxing carbon, repealing fossil fuel subsidies and making "massive" investments in clean energy sources, as he feels that the "the single greatest threat facing our planet" is climate change.

"Instead of engaging on this issue in good faith and allow democracy to play out, executives and lobbyists for coal, oil and gas companies have blocked every attempt to make progress on climate change and thrown unprecedented amounts of money at elected officials to buy their loyalty," Sanders says in the plan, according to The Washington Post.

Sanders also wants to "ban fossil fuels lobbyists from working in the White House," create a "100 percent clean energy system" and put "people before the profits of polluters," reports The Christian Science Monitor.

"The climate plan released by Senator Bernie Sanders today shows that he has broken free of the corporate and one percent money that has held back climate policy for far too long. Sanders has issued a powerful call for climate justice and decisive action to keep fossil fuels in the ground and support the communities who are suffering from climate and environmental impacts," said Annie Leonard, executive director of Greenpeace, according to The Huffington Post.