Trump's executive order called for an immediate withdrawal from the Paris Agreement. The Agreement requires one year notice, but there's room for interpretation.

The Paris agreement is a mostly voluntary climate pact originally written to both try to reduce warming and withstand the changing political winds in the U.S.

President Donald Trump has wasted no time dismantling climate policies and promising a new era of fossil-fuel dominance, withdrawing the US from the Paris Agreement on his first day back in office.