The Latest on President Barack Obama's summit Wednesday with Canadian Prime Minister Justin Trudeau and Mexican President Enrique Pena Nieto (all times local):

10:45 a.m.

The leaders of Canada, the U.S., and Mexico are spelling out how their nations will work together to curb global warming.

Canadian Prime Minister Justin Trudeau, U.S. President Barack Obama and Mexican President Enrique Pena Nieto (PAYN'-yuh nee-EH'-toh) say in a joint statement that they'll strive to use renewable sources of energy to generate 50 percent of North America's electrical power by 2025.

That's a significant leap from last year's 37 percent.

They're pledging to accelerate cross-border transmission projects, strengthen energy efficiency standards, and emphasize more efficient products and cleaner vehicles in government purchases.

They say North America has the "capacity, resources and the moral imperative" to build on that agreement.

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10:15 a.m.

President Barack Obama has arrived in Ottawa, Ontario, for a summit with the leaders of Canada and Mexico.

Trade, the environment and fallout from Britain's decision to leave the European Union are expected to top Wednesday's talks in the Canadian capital with Canadian Prime Minister Justin Trudeau and Mexican President Enrique Pena Nieto (PAYN'-yuh nee-EH'-toh).

The attack on a Turkish airport that killed 41 people the day before the summit is also expected to add urgency to discussions about how North America's neighbors can collectively enhance security.

The leaders will stress cooperation less than a week after Britain's vote to leave the EU highlighted public fears about globalization.

Donald Trump is also tapping into those concerns in his presidential run.

Obama also planned an address to the Canadian Parliament.