This is just one reason to get solar sooner rather than later: Carbon Is Building Up in Atmosphere Faster Than Predicted (washingtonpost.com)

“The new statistics also underscore the growing contribution to the world’s “carbon budget” from rapidly industrializing countries such as China, India and Brazil. Developing nations have roughly doubled their carbon output in less than two decades and now account for slightly more than half of total emissions, according to the new figures, up from about a third in 1990.”