amount of carbon dioxide in the Earth's atmosphere recorded at the Halley Research Station in Antarctica, as well as a monitoring post at the geographic South Pole, both located amid the most pristine air on the planet. This is the first time a sustained reading of 400 ppm was recorded over the period of a day.
23 May 2016
Day the observation was recorded at the South Pole. Given the remoteness of the Antarctic continent, this recording means that no part of the planet is spared from the impacts of human activity, according to David Vaughan, director of science at the Antarctic Survey.
Iice core samples of carbon dioxide levels and temperatures dating back these many years show that this the first time ever that the 400 ppm value has been breached.
CO2 levels at the start of the industrial revolution, when humans began burning fossil fuels for energy.