President Trump faces a choice that will echo across his presidency and beyond: whether to remain in the Paris climate agreement. Although most Americans, his own secretaries of state and energy, and heads of state from around the globe are urging the president to stay, he remains undecided. Let us hope that a newly invigorated pro-Paris campaign by many of America’s top C.E.O.s will sway him.

In a recent barrage of public letters and full-page ads, Fortune 100 companies are voicing strong support for remaining in the Paris accord. The breadth of this coalition is remarkable: industries from oil and gas to retail, mining, utilities, agriculture, chemicals, information and automotive. This is as close as big business gets to a consensus position.

American business leaders understand that remaining in the agreement would spur new investment, strengthen American competitiveness, create jobs, ensure American access to global markets and help reduce future business risks associated with the changing climate. Leaving Paris would yield the opposite.

Our companies are best served by a stable and predictable international framework that commits all nations to climate-change mitigation. The Paris agreement overcame one of the longest-standing hurdles to international climate negotiations: getting the developing world, including China and India, onboard. If America backs away now, decades of diplomatic progress could be jeopardized.