So far, no reliable method has been found for removing excess carbon from the atmosphere, other than dissolving it in the ocean. Which as we’ve just learned isn’t a good idea! A method may be found, but until then, the only solution we know is radically reducing the burning of fossil fuels. Period.
For scientific news, an excellent, constantly updated source is Ocean Acidification, a portal and blog sponsored by the European Project on Ocean Acification. Another excellent