United Nations agencies say imminent US withdrawal from World Health Organization and Paris climate agreement will have serious consequences for global health and efforts to slow down climate change

President Donald Trump will withdraw the United States from the Paris Climate Agreement for the second time, delivering a blow to the effort to keep global temperatures from rising to dangerous levels.

President Donald Trump ordered the U.S. to withdraw from the Paris climate agreement on Monday, once again placing the world's top historic emitter of greenhouse gases outside the global pact aimed at pushing nations to tackle climate change.