It's not practical now but maybe in a more enlightened (and warm) future it may be? https://en.wikipedia.org/wiki/Ocean_fertilization https://en.wikipedia.org/w

It's not practical now but maybe in a more enlightened (and warm) future it may be? https://en.wikipedia.org/wiki/Ocean_fertilization https://en.wikipedia.org/wiki/Ocean_fertilization could be cheap for example.