Mr.Obama and Democrats in Congress are backing a "cap and trade" bill, which aims to cut greenhouse gas emissions 17 percent by 2020.

VOA: standard.2009.05.30

And as you know, carbon dioxide is implicated as a greenhouse gas.

你知道的，二氧化碳意味着温室气体。

麻省理工公开课 - 固态化学导论课程节选

And so, when you think about how much cement concrete are consumed annually on the planet, this becomes a considerable point source of greenhouse gas emissions.

当你想到,在地球上每年要消耗多少的水泥混凝土的时候,这将是温室气体排放的,一个主要来源。

麻省理工公开课 - 固态化学导论课程节选

The European Union is at the forefront of a global push to reduce greenhouse gas emissions.

VOA: standard.2009.11.26

Greenhouse gas emissions such as carbon dioxide are thought to be a major cause behind rising temperatures that have lead to extreme weather and food shortages.

VOA: standard.2009.09.28

India hopes a massive increase in cleaner nuclear power will help it to check greenhouse gas emissions and cut its dependence on oil, most of which it imports.

VOA: standard.2009.09.29

The target pledges by the world's top-two carbon emitters are seen as hopeful signs for progress at Copenhagen, although a final package for global greenhouse gas reduction remains in doubt.

VOA: standard.2009.11.26

Bigger livestock herds are putting greater pressure on land resources and disrupting some ecosystems and the animals generate significant amounts of water and air pollution, including methane, a climate-changing greenhouse gas.

VOA: standard.2010.02.22

The White House says President Barack Obama will attend next month's climate change summit in Copenhagen,Denmark, and will make a provisional pledge to cut U.S.greenhouse gas emissions by 17 percent from 2005 levels by 2020.

VOA: standard.2009.11.26

The main goals of the summit are to agree on targets to cut to greenhouse-gas emissions and to set up a mechanism to provide developing countries with the billions of dollars needed to cope with climate change.

VOA: standard.2009.12.17

The addition of Franken will provide the Democrats with 60 votes in the U.S.Senate, giving President Barack Obama and party leaders a better chance of passing controversial legislation such as health care reform and a cap-and-trade bill aimed at curbing greenhouse gas emissions linked to global warming.

VOA: standard.2009.06.30