China: As world leaders converge in Paris for climate change talks, China has announced that it plans to launch satellites to monitor its greenhouse gas emissions. The country is estimated to be the world's top carbon emitter. According to reports, the Asian powerhouse’s first two carbon-monitoring satellites will be ready by May 2016. Changchun Institute of Optics and Fine Mechanics and Physics, which is a part of China's Academy of Sciences, have taken four years to develop the satellites. The United States and Japan are the only countries who monitor greenhouse gases from space currently.