Oceans of Lime: Reducing Greenhouse Gas

The addition of lime (calcium oxide) to the oceans may increase its capacity to absorb carbon dioxide from the atmosphere. The oceans absorbs about one third of the excess carbon dioxide in the atmosphere.

However, it requires money and energy to heat limestone to the correct temperature to create calcium oxide. It is suggested that energy from renewable sources are used for this process.

There are reservations about the idea and if it would actually be carbon negative at all. The scale on which it would have to be done to make an impact is also enormous. You can read more about this interesting global engineering idea at these web pages:

Cleaning up CO2 with a twist of lime

The Idea