What has kept temperatures from rising at an even higher rate A: The absorption of carbon dioxide by natural factors. B: Human effort to reduce carbon dioxide emissions. C: Drastically reduced emissions of greenhouse gases. D: A 10% decrease in the average weight of polar bears.

Solar water heaters help to lower energy cost and cut carbon emissions.

Geothermal energy brings air emissions including（      ）.

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 new government has committed to emissions of greenhouse gases.

Which of the following is NOT an example of a market-based instrument for the transition to a low-carbon economy? A: Carbon tax B: Emission permit system C: Emissions trading D: Direct government legislation of emissions

Using some ________ fuels ,such as natural gas, in vehicles can generally00a000a0reduce harmful pollutants and exhaust emissions.

If the greenhouse gas emissions are stopped, the warming of sea water will stop. ( )

Motor vehicle emissions, to a large extent,are responsible for ________ air pollution.

GIY helps carbon dioxide (CO2) emissions. A: reduce B: produce C: increase D: improve