During the last century or so, over half of the CO2 emissions from fossil fuel burning, industry, and deforestation have been absorbed by natural sinks such as the forests and oceans. (iiasa.ac.at)
As the electricity sector becomes cleaner through increased use of renewables and smart grid technologies, it provides a pathway to transition from fossil fuel use to electricity in new buildings. (climateweeknyc.org)
But in today's world, the greatly increased partial pressure of CO2 from fossil fuel emissions causes a flux of CO2 from the atmosphere to the oceans. (skepticalscience.com)