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Steep rise in CO2 levels

Rise in CO2 levels

Latest data shows steep rises in CO2 for seventh year

The concentration of carbon dioxide in the atmosphere has increased by the second highest annual rise in the past six decades, according to new data.

Atmospheric concentrations of the greenhouse gas were 414,8 parts per million in May, which was 3,5 ppm higher than the same time last year, according to readings from the Mauna Loa observatory in Hawaii, where carbon dioxide has been monitored continuously since 1958.

Scientists have warned for more than a decade that concentrations of more than 450 ppm risk triggering extreme weather events and temperature rises as high as 2C, beyond which the effects of global heating are likely to become catastrophic and irreversible.

May is the most significant month for global carbon dioxide concentrations because it is the peak value for the year, before the growth of vegetation in the northern hemisphere starts to absorb the gas from the air. The seasonal peak and fall can be seen in the Keeling curve.

This is the 7th consecutive year in which steep increases in ppm have been recorded, well above the previous average, and the fifth year since the 400 ppm threshold was breached in 2014.

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Insight in Air Quality | Air quality, health and environment: Steep rise in CO2 levels
Steep rise in CO2 levels
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