greenhouse
green hows
- n a building with glass walls and roof; for the cultivation and exhibition of plants under controlled conditions
- a of or relating to or caused by the greenhouse effect
greenhouse gases
- The molecules are similar to the glass in a greenhouse, which is why the warming process is called the greenhouse effect.
- We need to begin curbing global greenhouse emissions right now, but more than a decade after the signing of the Kyoto Protocol, the world has utterly failed to do so.
- When seven Northeastern states capped emissions of greenhouse gases by utilities last month, we took a giant step forward.