EghtesadOnline: Donald Trump insists he’s an environmentalist. But on the biggest issue of the day -- the origins of climate change -- his exact position remains a mystery.

EghtesadOnline: Leaders from the world's leading economies broke with U.S. President Donald Trump on climate policy at a G20 summit on Saturday, in a rare public admission of disagreement and blow to multilateral cooperation.

EghtesadOnline: China and Europe pledged on Friday to unite to save what German Chancellor Angela Merkel called "our Mother Earth", standing firmly against President Donald Trump's decision to take the United States out of the Paris climate change pact.

EghtesadOnline: President Donald Trump on Tuesday signed an order to undo Obama-era climate change regulations, keeping a campaign promise to support the coal industry and calling into question U.S. support for an international deal to fight global warming.