Throughout much of the press conference, Pruitt refused to say whether Trump believed in climate change, and he also indicated that the issue was not a factor when Trump held discussions about whether to stay in the Paris Agreement.
The agreement was loosely framed so as to ensure that each nation can come up with their own customised solutions to deal with climate change issues.
The controversial decision by President Donald Trump followed a meeting in Germany between China's Premier Li Keqiang and German Chancellor Angela Merkel, where the leaders pledged to work together on a cleaner environment.
US Secretary of State Rex Tillerson downplayed the significance of the US pullout from the Paris climate pact, arguing Friday that America still will continue taking steps to cut heat-trapping pollution.
"This is an insane move by this president - the world depends on a sustainable future", California Gov.
The agreement also allowed for poorer countries to be financially supported by richer nations.
Making the announcement at a ceremony in the White House Rose Garden, Trump, who once said global warming is a hoax perpetrated by Beijing, singled out India and China as he listed the reasons for withdrawing from the climate change accord.
In announcing his decision, Trump said he was "elected to represent the citizens of Pittsburgh, not Paris".
"We don't want other leaders and other countries laughing at us anymore".
Gearing up for Trump's decision, Reps. However, it takes four years for any country to legally withdraw from the agreement, which means that the U.S. will officially be removed from the accord at the same time Trump's current presidency comes to an end. This is not about responsibility; climate action simply makes sense to avoid risks and to build an economy that will be good for all. They agreed to lower emission reduction goals for rich nations and to a review of their climate mitigation targets every five years.
However, it remains unclear just how efficient cross-city and cross-state climate pacts will ultimately be in the face of a federal government determined to loosen restrictions on emissions and ramp up coal and natural gas production.
"It was a transfer of wealth from the most powerful economy in the world to other countries around the planet", he said. The agreement will protect businesses against environmental instability; it will determine the future competitive positioning of companies through the development and roll out of new technologies and business models; and it will create millions of jobs in green energies and local communities.
Stunningly, 2016 was the third straight warmest year on record, and the spread of diseases like Zika, which can cripple newborns, is increasingly linked to climate change.
Indian Prime Minister Narendra Modi - who has said failing to address climate change would be "morally criminal" - is due to visit the White House shortly. "We need to give people hope across the globe and stand up for our communities".