内容来源：分享美国 地址链接：http://go.usa.gov/3DjzF 
 
到2025年的时候你会在做什么？美国会在2025年到来前将造成气候变化的污染减少到比2005年低26%的水平。

这是美国向《联合国气候变化框架公约》（UN Framework Convention on Climate Change）的195个成员国作出的承诺。国际社会力求通过这个框架公约机制，达成一项减少全球温室气体排放的方案。

克里国务卿敦促其他国家在今年年底召开巴黎《联合国气候变化框架公约》会议前的时间内，也作出相似的减少碳排放承诺。与会国家致力于届时针对温室气体排放达成一项全面协议。

减少温室气体效应和应对气候变化一直是欧巴马政府的重点目标。做法包括：

• 在清洁能源领域投资800多亿美元
• 提高机动车燃油效能标准
• 加强建筑物系统的能源效率标准
• 提出针对现有发电厂的指导方针，旨在到2030年时将排放减少到低于2005年30%。

That’s the pledge the United States is making to 195 partner nations in the U.N. Framework Convention on Climate Change (UNFCCC), the international forum charged with hammering out a plan to reduce global greenhouse gas emissions.

Those gases contribute to climate change, glacial meltdown, sea-level rise and extreme weather events. Together, scientists predict, those trends will have disastrous effects on ecosystems, agriculture, public health, clean water supplies and other systems that support human life.

On March 31 the Obama administration submitted to the UNFCCC its targets to cut emissions at least 26 percent by 2025, joining similar commitments recently made by other nations.

“This is a global challenge,” Secretary of State John Kerry said, “and an effective solution will require countries around the world to do their part to reduce emissions and bring about a global clean-energy future.”

In total, countries that produce more than 50 percent of global carbon dioxide emissions have announced their targets.

• China committed to stop emissions increases by 2030 and to boost its use of clean fuels to around 20 percent of total energy consumption by the same year.
• The European Union, with 28 member nations, aims to cut emissions 40 percent below 1990 levels by 2030.
• Mexico plans to stop emission increases by 2026, and is working toward a climate policy accord with the United States.

Secretary Kerry urged other nations to come forward with similar commitments to reduce carbon emissions in the months remaining before a year-end UNFCCC meeting in Paris. Participating nations aim to forge a comphrehensive agreement for greenhouse gas reductions at that time.

Gabon, Norway, Russia and Switzerland are among other nations that have submitted their targets to the UNFCCC.

Reducing greenhouse gas emissions and addressing climate change have been priorities for the Obama administration. It has:

• Invested more than $80 billion in clean energy.
• Raised vehicle fuel-economy standards.
• Strengthened energy-efficiency standards for buildings systems.
• Proposed guidelines for existing power plants that would reduce emissions to 30 percent below 2005 levels by 2030.

The U.S. target submitted to the UNFCCC would double the nation’s rate of carbon reduction from 1.2 percent annually over the last decade to up to 2.8 percent annually after 2020.