Instead of solving climate change, carbon dioxide would contribute to it or it could leak into nearby watersupplies and (a)   them. (contamination)

When we start living with cyborgs, the smarter and more adaptable species will definitely dominate ;that's why, transhumanism is a (a)   issue. (controversy)

Scientists are looking for ways to imitate the cooling effect of volcanic (a)   to stop global warming. (erupt)

The (a)   of renewable energy sources can conduce to reducing greenhouse gas emissions. (implement)

Geoengineering is the transformation of the Earth’s climate through human (a)   . (intervene)

The whole idea of general intelligence is actually superfluous since it is always possible to develop systems that (a)   human creativity at any level of complexity. (mimicry)

Geoengineering is being discussed because by using geoengineering methods, we may be able to (a)   the effects of climate change. (reversable)

The main causes of ozone (a)   and the ozone hole are manufactured chemicals, especially manufactured halocarbon refrigerants, and solvents. (deplete)

The middle class pioneered a new definition of family size that would (a)   become more widespread in European society. (ultimate)