The world is experiencing its largest loss of life since the dinosaurs, with around 1 million plant and animal species now threatened with extinction. That's according to the United Nations Environment Program. It's also the focus of this week’s UN Biodiversity Summit where leaders and environmentalists from nearly 200 countries are meeting in Cali, Columbia to debate ways to reverse the trend and save nature. We speak with Tanya Sanerib International Legal Director with the Center for Biological Diversity.