Barack Obama says Jeff Bezos should worry about Earth before space. But Bezos says going to space is how you save Earth.

• Barack Obama recently chastized Silicon Valley tycoons looking at space exploration to save humanity. 
• Focussing on saving Earth is the best bet for now, the former president said. 
• But Bezos argues that the best way to save Earth is to turn to space. 

Barack Obama and Jeff Bezos are at loggerheads on how ambitious goalposts to colonize the solar system will affect Earth's future.