India, Jan. 8 -- President Donald Trump has signed a presidential memorandum ordering the United States to pull out of 66 international organizations and treaties. These include the United Nations Framework Convention on Climate Change (UNFCCC) and the Intergovernmental Panel on Climate Change (IPCC).

This decision means the United States, which is the world's largest historical polluter, will no longer be part of the main global agreement to fight climate change or the scientific system that studies it. As a result, the U.S. will no longer contribute its fair share toward reducing global warming or helping developing countries with climate finance for clean energy, emissions cuts, and climate adaptation.

Most of the organisations targe...