Without gravity to help circulate air, the carbon dioxide you exhale has a tendency to form an invisible cloud around your head.

如果没有重力帮助空气循环，你呼出的二氧化碳会在你头顶周围形成一个看不见的云状物。

youdao

Start by planting 10 trees we each need to absorb the carbon dioxide we exhale.

每个人从种10棵树开始，就可以吸收我们呼出的二氧化碳了。

youdao

After everybody rests, each minute must inhale the person 300 milliliters oxygen to exhale 250 milliliters carbon dioxide.

人人睡后，每分钟要吸人300毫升氧气呼出250毫升二氧化碳。

youdao

In 2009, the EPA declared their intention to regulate carbon dioxide (we exhale this dangerous gas) as a pollutant.

FORBES: The Truth About Obama, Oil And The Gasoline Blame Game-Part Two

The emissions they seek to regulate are not dirty, sooty carbon, but carbon dioxide, that harmless gas that we exhale with every breadth.

FORBES: The Goal Is Power: The Global Warming Conspiracy