Sentence examples for ppm of carbon from inspiring English sources

"In 2012 another two parts per million (PPM) of carbon dioxide (CO2) were added to the atmosphere, followed by another 2.8 ppm in 2013 and roughly the same again in 2014.

"Fifty five million years ago, there were more than 1,000 parts per million (ppm) of carbon dioxide in the atmosphere," said Professor Stephen Pekar, of City University of New York.

When global temperatures were more or less stable before industrialisation, the atmosphere contained roughly 280 parts per million (ppm) of carbon dioxide.

If the world is to stay below 2C of warming, which scientists regard as the limit of safety, then emissions must be held to no more than 450 parts per million (ppm) of carbon dioxide in the atmosphere; the level is currently around 390ppm.

And levels of organic carbon there are minuscule compared with the 500 ppm of carbon reported on Mars.

Integrated gas sensors with sensitivity down to 1 ppm of carbon monoxide were demonstrated using this technology.

That is because 350 parts per million (ppm) of carbon-dioxide in the atmosphere is the level that, in the words of James Hansen, a prominent climate scientist, is needed "to preserve a planet similar to the one on which civilization developed and to which life on Earth is adapted".

A 1.0 ppm increase of carbon monoxide during the last month of pregnancy was associated with an 8% increase of preterm delivery.

2013 was the year we broke 400 ppm of atmospheric carbon dioxide; in 2014 we will set a new record.

A change from 8 ppm to 600 ppm of the carbon content leads to an increase in the ultimate tensile strength of more than 65% by keeping a ductility of 70%.

Thus, gHSQC was used to identify the C shift (54.5 ppm) of the tertiary carbon directly bound to the vancomycin X1 secondary amine.