Panama has alerted the United Nations - in a letter seen by Reuters on Tuesday - to U.S. President Donald Trump's remarks during his inauguration speech, when he vowed that the United States would take back the Panama Canal.

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.

Paris climate agreement is not the boogeyman that punishes the United States that critics such as President Donald Trump claim. But it hasn’t quite kept the world from overheating either. The Paris agreement is a mostly voluntary climate pact originally written in ways that would both try to reduce warming and withstand the changing political winds in the United States.