单词 | carbon levels |
释义 | carbon levels At the time, the site’s carbon levels hovered around 315 ppm, but by 2013, they had surpassed 400 ppm. Retrieved from Wikipedia CC BY-SA 3.0 As carbon levels continue to rise at a rate of around three ppm, such occurrences could become dangerously commonplace. Retrieved from Wikipedia CC BY-SA 3.0 Experts say they will also help reduce carbon levels, curbing climate change. The Sun The tensions between national and global interests caused by rising carbon levels constitute the great political and intellectual challenge of the age. Times, Sunday Times The rainforest has a crucial role in absorbing carbon and pumping oxygen into the atmosphere - and the fires and deforestation add to carbon levels. Times, Sunday Times |
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