Diesel exhaust particles, a major part of urban smog, consist of a carbon core coated with organic chemicals and metals.

柴油车尾气粒子，是城市烟雾的主要组成部分，是由外表包裹着有机化学和五金的碳芯组成的。

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Other data from the Vostok core show that methane gas also correlates closely with temperature and carbon dioxide.

来自 Vostok 地核的其他数据显示，甲烷气体也与温度和二氧化碳密切相关。

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Red giants are hot enough to turn the helium at their core, which was made by fusing hydrogen, into heavy elements like carbon.

红巨星的温度足够高，可以将其核心中由氢聚变成的氦再转变为重元素，比如碳。

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Scientists think the WAIS Divide core should provide the most accurate record to date of atmospheric carbon dioxide, which will allow them to better ascertain the role of carbon dioxide in climate change.

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So, its of no surprise, when looking at long term ice core sample and ocean core deposits, they indicate as the Earth warms, so does the carbon footprint from the increase carbon produced high in the atmosphere.

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He insists that industry, as well as governments, must tackle the core issues, rather than trying to rid themselves of responsibility through measures like carbon offsetting - where individuals or companies balance their carbon output by financing green projects.

BBC: A hiker looks out over a mountain in Switzerland