Chinese factories churn out parts and products that end up in our cars, our kitchens and our cell phones. And all that productivity has improved the lives of its citizens, many of whom can now afford cars and cell phones of their own. It’s also made China the global leader in carbon emissions. But in her new book, “Will China Save the Planet,” Barbara Finamore says that China may well take the lead in saving the world from environmental catastrophe. How? By phasing out coal and investing in green energy to power its factories and keep its cities moving. With the US government cutting efforts to curb carbon pollution, is it possible that China is our best hope for saving the planet?