Is Global Warming really caused by Greenhouse gases, or is it just a natural cycle?
A study published in the Proceedings of the National Academy of Sciences reported that, in the first six years of this new century, carbon dioxide (the main greenhouse gas) emissions rose more than twice as fast as they did during the 1990s. And, the authors report, the earth’s natural carbon “sinks” such as forests and oceans that store carbon and buffer us against climate change don’t appear to be working as efficiently as they did 50 years ago. In other words, Mother Nature’s ability to soak up our greenhouse pollution is weakening – and that threatens to speed up global warming even more.
