Former Secretary of State George Shultz, who served under President Ronald Reagan, gave advice to President-elect Donald Trump on a suite of policy issues and said he hopes the new administration will consider action on climate change.

“People who say the climate isn’t changing are in the process of getting mugged by reality,” he said. “Zika is the tip of the iceberg. With climate change, tropical diseases are coming north, carried by mosquitoes…. and we’re not ready for it.”

Shultz is a long time supporter of a carbon tax.