Trading emissions for forestry credits is now in their early stages in China. Just a few weeks after the launch of the program the first overseas enquiry arrived.

林业信贷额的交易排放现在在中国处于早期阶段。在项目开始不到几个星期之后，就收到第一个海外咨询。

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A tax on upstream carbon sources is one easy way to put a price on carbon emissions, although some countries may wish to use other methods, such as emissions trading schemes.

对上游碳资源征税是为碳排放定价的一种简单方法，尽管一些国家可能希望使用其他方法，例如碳排放交易计划。

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Critics of emissions trading will undoubtedly say the US is better off without it.

毫无疑问，排放交易计划的批评者会说，美国最好不搞这个。

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most sweeping emissions trading system companies would have to buy permits for every ton of carbon they emit, a system designed to provide financial incentives for those that reduce their pollution.

VOA: standard.2009.05.03

The European Union argues that one credit must equal one tonne of carbon dioxide for its Emissions Trading Scheme, the largest emissions market, to be effective.

ECONOMIST: Carbon markets

The country's regime for trading sulphur emissions has done much to reduce acid rain, achieving 100% compliance with the rules because firms' bosses risk lengthy prison-sentences if they violate them.

ECONOMIST: Hunting corporate criminals

Proponents of carbon trading envisage a new global investment market based on emissions trading, where companies and countries have incentives to invest in developing world projects due to the highly coveted carbon credits they receive for doing so.

CNN: All About: Forests and carbon trading