Libertarian Party presidential nominee Gary Johnson suggested on Sunday that climate change could not be stopped and that the solution was for the human race to "inhabit other planets."

During an interview on ABC's This Week, host George Stephanopoulos reminded Johnson that he had warned in 2011 that global warming was "in our future" because the sun would eventually "grow and encompass the Earth."

"Does that mean we don't do anything about it now?" Stephanopoulos wondered.

"No, come on," Johnson replied. "Can't we have a little humor once in a while. And that is long term."

"I mean, plate tectonics," he continued. "At one point, Africa and South America separated -- and I am talking now about the Earth and the fact that we have existed for billions of years and will going forward."

"Look, what it points to also is the fact that we do have to inhabit other planets. The future of the human race is space exploration."