By William C. Eacho, Co-founder of the Partnership for Responsible Growth

Re “The Silver Lining of Leaving Paris” (editorial, June 2):

While everyone on the planet should be grateful that various American states and cities are taking responsibility for fighting global warming, the world’s richest country must simply find the will to enact a national solution.

The quickest, most efficient and most potent solution, according to economists, is a carbon fee. Since air pollution, climate change and other problems are caused by burning carbon, the price of carbon should include the costs that those problems impose on all of us and on our economy.

If Congress put a fee on carbon emissions, the free market would accelerate the shift toward sources like solar and wind power. And one price for carbon would make much more sense than a variety of prices set by states.

Such a fee would generate a sizable revenue stream, enabling investments in our ailing infrastructure or other priorities. Some of the proceeds could be rebated to low- and middle-income households to cover slightly higher energy costs.

Can Congress deliver? The percentage of Republican voters who want action is rising, particularly among younger generations. And half of the 78 House members who have joined the Climate Solutions Caucus are Republicans.

It’s time for the G.O.P. to take its conservation flag out of hiding and run it back up the pole.