Tag Archive for 'ppm'

Long term exposure to air pollution linked to heart attacks and angina

January 22nd, 2014 by British Medical Journal

Research conducted at the Department of Epidemiology in Rome, Italy and published in the paper ‘Long term exposure to ambient air pollution and incidence of acute coronary events’ on bmj.com suggests that long term exposure to particulate matter in outdoor air is strongly linked to heart attacks and angina, and this association persists at levels […]

Scripps tweets daily atmospheric C02 reading as it nears 400 ppm

April 23rd, 2013 by Scripps Institution of Oceanography

For the first time in human history, concentrations of the greenhouse gas carbon dioxide (CO2) could rise above 400 parts per million (ppm) for sustained lengths of time throughout much of the Northern Hemisphere as soon as May 2013. To provide a resource for understanding the implications of rising CO2 levels, Scripps Institution of Oceanography […]