Which of the following groups ( ) can be used as metrics to manage climate change A: Acid gas emissions, atmospheric hydrogen ion concentrations, reduction of acid gases B: Heavy metal emissions, heavy metal concentrations in soil, recovery of heavy metal scraps C: Nitrogen emissions, nitrogen concentration in water, investment on nitrogen removal equipment D: GHGs emissions, atmospheric GHGs concentration, energy consumption intensity

The accumulation of greenhouse gases (GHGs) causes global warming by letting sunlight into the atmosphere as _______. Then, when the earth re-radiates the heat back to space, the gases trap the energy in the form of outgoing ______. A: visible light, ultraviolet radiation B: infrared radiation, ultraviolet radiation C: ultraviolet radiation, infrared radiation D: infrared radiation, radio waves