The production and emission of gas, water and solid wastes heavily destroys and pollutes the environment. It is also harmful to the human life and profit.

废气、废水、废渣的产生和排放破坏和污染了人类赖以生存的自然环境，进而危害了人类自身的生命和利益。

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Its scientific name is flatus, but the English language has an impressive range of colorful terms to describe the explosive emission of digestive gas.

它的学名是肠胃胀气，不过英语里有一套令人印象深刻的生动说法来形容这种消化气体的排放。

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The cave-making recipe calls for a steady emission of volcanic gas and heat, a heavy annual snowfall at an elevation high enough to keep it from melting during the summer.

洞穴的形成需要火山气体和热量的稳定释放，海拔高到足以防止每年的大量降雪在夏季融化。

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Stacking up the numbers, he realised that human activities were adding CO2 to the atmosphere in a quantity and rate equivalent to all natural processes of absorption or emission of the gas.

FORBES: Global Warming Is No Threat?

However, in order to meet European Union greenhouse gas emission standards, Poland is planning to switch a substantial part of its electricity production from coal to natural gas.

FORBES: Poland: Fracing On The Rise?

What would such levels imply in terms of greenhouse gas stabilisation concentrations and emission pathways required to achieve such levels?

BBC: NEWS | Science/Nature | Scientists debate climate dangers