Leaders of the U.S., Mexico, and Canada are expected to call for half of North America’s electricity to come from clean power by 2025.

White House climate adviser Brian Deese described the pact as a sign of the growing bonds between the nations on climate and energy policies. He told reporters yesterday that the trio are cooperating more on those issues now than at any time in recent history.

The commitment, which will be a joint one, rather than an individual commitment by each nation represents an aggressive target given the current reliance by the United States and Mexico on fossil fuels for much of their electricity supply. Currently 37% of North America’s overall power last year came from clean sources.

Roughly 13 percent of U.S. electricity comes from hydropower and other renewable sources, according to the Energy Information Administration, with another 20 percent stemming from nuclear power plants.  While Mexico produced less than 20% of its power from clean energy

For Canada, though the country already gets more than 80 percent of its electricity from clean sources, including hydro, solar, wind, and nuclear.

The new commitment includes not just renewables but also nuclear and carbon capture and storage plants and energy efficiency.