International scientists found that inefficiency in the use of fossil fuels increased levels of CO2 by 17%. The other 18% came from a decline in the natural ability of land and oceans to soak up CO2 from the atmosphere. About half of emissions from human activity are absorbed by natural "sinks" but the efficiency of these sinks has fallen, the study suggests. "In addition to the growth of global population and wealth, we now know that significant contributions to the growth of atmospheric CO2 arise from the slow-down of natural sinks and the halt to improvements in the carbon intensity of wealth production," said the study's lead author, Dr Pep Canadell, executive director of the Global Carbon Project.
The weakening of the Earth's ability to cope with greenhouse gases is thought to be a result of changing wind patterns over seas and droughts on land. "The decline in global sink efficiency suggests that stabilisation of atmospheric CO2 is even more difficult to achieve than previously thought," said report co-author Dr Corinne Le Quere of the British Antarctic Survey. "We found that nearly half of the decline in the efficiency of the ocean CO2 sink is due to the intensification of the winds in the Southern Ocean."
Posters due by Thursday, December 15th!
Rainforests in the Classroom is sponsoring a Holiday Poster Contest to encourage using less oil to help stop global warming. The top entries will be featured on the Rainforest Action Network website! We are focusing on the North Pole, because it's the holidays and because the Arctic is already being changed in a big way due to global warming. Posters make for a great art project and can also be a positive experience that helps to make a difference. We welcome posters from students with all levels of artistic ability.
The student and student’s teacher with the winning poster will each receive $75 gift certificates to the Discovery Store.
Download the poster contest packet (here's a zip of the whole packet):
Please send all posters (or letters) by Thursday, December 15th to:
Tracy Solum Rainforest Action Network 221 Pine Street, Suite 500 San Francisco, CA 94104
If you plan to send in posters, please let us know. Also, don’t hesitate to email us with any questions. Together we can help reduce our use of oil and keep global warming from getting worse in the future. Thank you so much for getting involved!