DAVOS, Switzerland — Day 2 of the World Economic Forum in the Swiss Alps witnessed strong responses to President Donald Trump’s decision to withdraw from the Paris climate agreement, with European leaders stating in no uncertain terms that they will remain a part of the global climate pact.

European Commission President Ursula von der Leyen said Tuesday: “Europe will stay the course, and keep working with all nations that want to protect nature and stop global warming.”

She insisted the 27-nation European Union bloc will stick to the landmark accord. “The Paris Agreement continues to be the best hope for all humanity,” she said.

The accord is aimed at limiting long-term global warming to 2.7 degrees Fahrenheit or, failing that, keeping temperatures at least well below 3.6 degrees above pre-industrial levels.

U.N. climate chief Simon Stiell, speaking at a panel looking ahead to this year’s upcoming climate talks in Brazil, said the “door remains open” for the United States.

“The world is undergoing an energy transition that is unstoppable. Last year alone, over $2 trillion was invested in the transition (to clean energy). And that compares to ($1 trillion) in fossil fuels,” he said.

Stiell said that there is “crisis fatigue” in the world now.

“The poly crisis environment that we’ve been in for the last few years, climate has been pushed down the crisis priority list,” he said. However, he said that regardless of political changes, “the science behind climate hasn’t changed. The impacts actually have changed in that they’re simply getting worse and worse.”