US President Donald Trump today signed another controversial executive order to radically change his predecessor Barack Obama's climate policies, dealing a body blow to the worldwide efforts to combat global warming.

US President Donald Trump on Tuesday signed an executive order rolling back Obama-era rules aimed at curbing climate change.

Speaking as he signed the order on Tuesday, accompanied by coal-miners, Trump said it would put an end to the war on coal and job-killing regulations.

The Energy Independence Executive Order suspends more than half a dozen measures enacted by the president's predecessor, and boosts fossil fuels, BBC reported.

A coalition of 16 mostly Democratic-led states and environmental groups involved in the legal case say they will oppose the administration's request for a delay.

US President Donald Trump has signed an executive order that undoes the Obama Administration's Clean Power Plan and has ordered the Environmental Protection Agency (EPA) to review and rewrite it.

The company describes the agreement as "an effective framework for addressing the risks of climate change", and highlights opportunities for USA businesses in the Paris framework for curbing greenhouse gas emissions. A second order says federal agencies should no longer consider climate change when implementing federal contracts, issuing permits, when formulating planned uses of federal lands, or use speculative climate impacts of a proposed action to halt it. But Trump said the effort would spark "a new energy revolution" and lead to "unbelievable" American prosperity.

President Trump's order lifts restrictions on the production of oil, natural gas, and shale energy, and also removes restrictions on the coal industry.

The official at one point appeared to break with mainstream climate science, denying familiarity with widely publicized concerns about the potential adverse economic impacts of climate change, such as rising sea levels and more extreme weather. He said he proposed the miners get out of the industry and find other jobs. "It's embarrassing to us and our businesses on a global scale to be dismissing opportunities for new technologies, economic growth, and USA leadership".

"Coal is still a reliable, stable source of generating electricity". "Climate change is real and is a great threat that can not be ignored", Brown said.

Obama's Clean Power Plan would limit greenhouse gas pollution from the power setor beginning in 2022.

"What we need to do is have an all-of-the-above policy, and I'm willing to compete with gas, nuclear and the other low-priced means for generating electricity with our coal - as long as the government stays out of it and allows the marketplace to make the decisions", he said.

Laurence Tubbiana, formerly the top French diplomat on climate change and now the CEO of the European Climate Foundation, said in a statement that the order "will propel the economy backwards". "We can protect the environment while providing people with work".

Activists worry that Trump's order will undermine years of environmental progress: Even though the Clean Power Plan is tied up in court and not being enforced, about 85 percent of states are on track to meet its emissions-cutting goals anyway.

It also rescinds a number of the previous administration's actions that do not reflect this administration's priorities. There is no other mention of renewable energy in it. In citing an analysis from the Energy Department, the Associated Press found that coal mining jobs account for less than 75,000 jobs compared to more than 650,000 jobs in the renewable energy sector, which includes solar, biofuels and wind. In a speech in West Virginia on Saturday, Vice President Mike Pence said the bill marks a new era of American energy.