The next couple of years will be crucial for governments to take action on climate change. In this edition we hear why and what’s being done about it. We meet Hilda Heine, a global leader on climate change and President of the Marshall Islands; we’ll look at how Americans recycle and find out why it’s not good enough for China; Economist Michael Greenstone explains how air pollution shaves two years off of the average life expectancy; A team of Israeli students create a new variation of falafel with spirulina, a kind of microalgae, that could be a sustainable food solution of the future; and we check out the environmentally friendly sounds of the Colombian band, Bomba Estereo. (Photo: The leaves of a Russian River Valley pinot noir vineyard begin to turn colour near Sebastopol, California. A cool spring and mild summer have contributed to a later-than-usual harvest and a bumper crop of premium wine grapes throughout the state of California. Credit: George Rose/Getty Images)