麻豆约拍

The chief executive of vaping firm Juul, has stepped down, amid growing concerns around vaping health risks and criticism of its marketing. Also in the programme, with Earth's population set to grow 25% by 2050, we ask how people will be accommodated. Hannah Olmberg-Soesman, co-founder of solar energy business Guguplex Technologies, Olivia Feng of software company ICAN Future Star, and Professor Klaus Lackner, director of the Centre for Negative Carbon Emissions at Arizona State University discuss the issues. And new UN research by more than a hundred scientists around the world warns of the increasing devastation climate change will inflict on coastal megacities and small island nations. Brian Klinksiek is strategy director at US property investment company Heitman, and gives his perspective on what the scientists had to say.

(Picture: A sign advertises Juul vaping products in Los Angeles, California. Picture credit: ROBYN BECK/AFP/Getty.)