Students all over the globe striking school to call for an end to climate change. With pressure coming from multiple directions, here has never been so much attention on the issue. So why now? We went to the recent London youth climate strike to talk with protestors and find out why they got involved. We also spoke to Tearfund campaigns expert, Sarah Edwards, who shared her thoughts on the protests, Greta Thunberg and why climate change demands urgent action. Join Emma and Chris as they investigate what it takes to stop climate change.