How long have you lived here? http://www.brainsatwork.nl/essay-writing-my-grandmother decorate jane austen research paper decipher Ocean acidification begins, as most climate change stories do, with fossil fuel burning and burgeoning atmospheric CO2 levels. As CO2 levels rise, the ocean’s levels of the gas also rise: the world’s oceans absorb about a quarter of the atmosphere’s CO2, an intake that reduces the seawater’s pH, as well as the water's concentration of the calcium carbonate minerals that support the formation of marine life’s skeletons and shells.