他们拯救了0.3平方公里雨林，净化了一百万公斤二氧化碳，给非洲赠送了两万两千本图书，并为缺粮少食的人购买了两万公斤大米。
They have saved 0.3 km2 of rainforest, cleaned up million kg of CO2, sent 22,000 books to Africa, and bought 20,000 kg of rice for people without enough food.
只要石灰窑按照正确的方法运作，产生的将是浓缩和净化后的二氧化碳气体。
The gas will already be concentrated and pure if the kilns work the right way.
许多制糖工厂在现场运行石灰窑以生产净化过程所需的生石灰和二氧化碳。
Many sugar beet plants are operating lime kilns on-site to produce both the quicklime and the carbon dioxide required for the purification process.
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