GENEVA, Nov 20 (Reuters) - Atmospheric volumes of greenhouse
gases blamed for climate change hit a new record in 2011, the
World Meteorological Organization (WMO) said in its annual
Greenhouse Gas Bulletin on Tuesday. The volume of carbon
dioxide, the primary greenhouse gas emitted by human activities,
grew at a similar rate to the previous decade and reached 390.9
parts per million (ppm), 40 percent above the pre-industrial
level, the survey said. It has increased by an average of 2 ppm
for the past 10 years. Fossil fuels are the primary source of
about 375 billion tonnes of carbon that has been released into
the atmosphere since the industrial era began in 1750, the WMO
said. WMO Secretary-General Michel Jarraud said the billions of
tonnes of extra carbon dioxide would stay in the atmosphere for
centuries, causing the planet to warm further. "We have already
seen that the oceans are becoming more acidic as a result of the
carbon dioxide uptake, with potential repercussions for the
underwater food chain and