Oceans have absorbed up to 30 percent of human-made carbon dioxide around the world, storing dissolved carbon for hundreds of years. As the uptake of carbon dioxide has increased in the last century, so has the acidity of oceans worldwide. Since pre-industrial times, the pH of the oceans has dropped from an average of 8.2 to 8.1 today. Projections of climate change estimate that by the year 2100, this number will drop further, to around 7.8 — significantly lower than any levels seen in open ocean marine communities today. ... Read more about Ocean acidification may cause dramatic changes to phytoplankton
It was almost 20 years ago that Ma Jun sat and watched the rainbow-coloured River Fen, in Shanxi province. As he turned to the skies in this coal and industrial heartland of north China he could see dozens of chimneys bellowing out their fumes.