Institutional investors with $26 trillion in assets under management called on Group of Seven leaders on Monday to phase out the use of coal in power generation to help limit climate change, despite strong opposition from Washington.

Government plans to cut greenhouse gas emissions were too weak to limit warming as agreed by world leaders at a Paris summit in 2015, they wrote. U.S. President Donald Trump announced a year ago that he was pulling out of the pact.

"The global shift to clean energy is under way, but much more needs to be done by governments," the group of 288 investors wrote in a statement before the G7 summit in Canada on June 8-9.