Water vapor, which looks like smoke, is seen rising from a power plant near Hengshui in China's Hebei province. In November, President Obama announced a landmark carbon-cutting deal with China — the world's leading producer of greenhouse gases. And the Chinese government has announced plans to cap the use of coal within five years.
Some of the stories that gripped our attention in 2014 will probably be forgotten in a few years — if not a few weeks. But there's one story that President Obama argues we'll be living with for decades to come.