A cap is set on the total amount of certain greenhouse gases that can be emitted by installations covered by the system. (ec.europa.eu)
The recent slow down in global warming has been attributed to a number of factors, including excess heat being stored in the deep ocean and reductions of certain greenhouse gases. (climatestate.com)
He explained that the intermediates turn certain greenhouse gases into aerosols, which help form clouds that have a net cooling effect on the planet. (scientificamerican.com)