Which one of the following is not an example of geoengineering?
(Points : 5)
injecting sulfate aerosols into the stratosphere
erecting large carbon dioxide scrubbers to sequester ...
... carbon dioxide in deep reservoirs
seeding the oceans with iron to promote the growth of phytoplankton
erecting large fields of wind turbines to generate electricity to power automobiles
erecting large carbon dioxide scrubbers to sequester carbon dioxide in deep reservoirs
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