Ad Urges Trump to Keep Promise, Exit Paris Climate Agreement

Environmentalist activists form a human chain representing the peace sign and the spelling out "100% renewable", on the side line of the COP21, United Nations Climate Change Conference near the Eiffel Tower in Paris, Sunday, Dec. 6, 2015. Negotiators adopted a draft climate agreement Saturday that was cluttered with brackets and competing options, leaving ministers with the job of untangling key sticking points in what is envisioned to become a lasting, universal pact to fight global warming. (AP Photo/Michel Euler)
The Competitive Enterprise Institute (CEI) launched an ad campaign urging President Donald Trump to withdraw from the Paris climate agreement.