Former Prime Minister Stephen Harper was a staunch supporter of what he called the “no-brainer” project. President Obama, on the other hand, felt like all sorts of brain should be involved when deciding on the future of such major fossil fuel infrastructure. And he rightfully rejected the border crossing pipeline project, which had clearly failed his climate test.

Now, with Canada’s new Prime Minister Justin Trudeau at the helm of America’s Hat, the two most intimately tied economies in the developed world have a lot of catching up to do. Even with Keystone XL dead and buried (sort of), environment and energy issues are still top of mind for the two leaders.

In a recent Q and A with the Huffington Post, Trudeau acknowledged the timing is right for bold leadership on climate change and the environment: “There is a nice alignment between a Canadian Prime Minister who wants to get all sorts of things done right off the bat and an American President who is thinking about the legacy he is going to leave in his last year in office,” Mr. Trudeau said.

“The issues that are important to him and to me are climate change.”

Obama and Trudeau already had an informal ‘bromance’ meeting soon after the new Prime Minister took office in November 2015. But now, with the unprecedented Paris Agreement behind them, the two leaders have an incredible opportunity to break new ground on climate action and environmental protection at this formal summit.

Here are the top five energy and environment issues these self-proclaimed climate leaders should have on their agenda:

1. North American Climate Change Strategy

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