Yeah, we did know: https://dotearth.blogs.nytimes.com/2016/10/21/coals-link-to-global-warming-explained-in-1912/ https://dotearth.blogs.nytimes.com/2016/10/21/c

Yeah, we did know: https://dotearth.blogs.nytimes.com/2016/10/21/coals-link-to-global-warming-explained-in-1912/ https://dotearth.blogs.nytimes.com/2016/10/21/coals-link-to-...