CO2 levels hit record high – WMO
WMO, a U.N. agency, showed levels of carbon dioxide, the main
greenhouse gas, climbing steadily towards the 400-parts-per-million (ppm)
level, having hit a new record every year since reliable records began in 1984.
Levels of the other two major man-made
greenhouse gases, methane and nitrous oxide, also continued a unrelenting
annual rise in 2014, reaching 1,833 parts per billion (ppb) and 327.1 ppb,
respectively. Both rose at the fastest rate for a decade.
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