chai jing, a high-profile journalist, recently triggered outrage when it emerged that she had given birthto her daughter in the u.s. many denounced her as a traitor. the chinese couples who dream the american dream on behalf of their children are better off keeping it to themselves. >> according to u.n. experts, the earth in the midst of a mass extinction of life. they estimate that up to 200 species are lost per day. if true, during the course of this program, we will have lost around three species to extinction. mostly because of the impact we humans are having on nature. but this general statistic oversimplifies reality. that's because the destruction of nature is all the more devastating if it hits specific areas that are home to an unusually high number of rare or valuable species. harm one of those and it's the equivalent of stabbing nature in the heart. time to take stock of what we still stand to lose. >> up to 14 million species inhabit our planet. animals, plants, fungi and microorganisms. but do we need them all? butterflies, for example. biologists have identified around 180,0