458 Engineering Response to Climate Change
approval and would not seem to raise signicant ethical issues, at least some
of the approaches would require land, competing with other pressing needs.
Actions aimed at increasing oceanic uptake of CO
2
, assuming the CO
2
would
really be sequestered for an extended period, are already being brought
under the auspices of an existing international framework, on the one hand,
providing a designated forum for discussion and, on the other hand, mak-
ing clear that international agreement will be needed to proceed. And this
is occurring for a general category of climate engineering that would only
have the potential to have a relatively small effect spread over many decades.
Whether there is a cost-effectiv ...