the clearest of these is simple accounting - humans are emitting co2 at a rate twice as fast as the atmospheric increase (natural sinks are absorbing the other half).
the clearest of these is simple accounting - humans are emitting co2 at a rate twice as fast as the atmospheric increase (natural sinks are absorbing the other half).
fossil fuel:14
it is estimated that natural processes can only absorb about half of that amount, so there is a net increase of 10.65 billion tonnes of atmospheric carbon dioxide per year.