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- 23 May 2007 at 4:13 pm #3428Quote:While global warming deniers argue that most climatologists are alarmists, CO2 emissions in the past few years have exceeded the levels used in scientists’ models — signaling even more cause for concern.
Global emissions of carbon dioxide are growing at a faster clip than the highest rates used in recent key UN reports.
CO2 emissions from cars, factories, and power plants grew at an annual rate of 1.1 percent during the 1990s, according to the Global Carbon Project, which is a data clearinghouse set up in 2001 as a cooperative effort among UN-related groups and other scientific organizations. But from 2000 to 2004, CO2 emissions rates almost tripled to 3 percent a year – higher than any rate used in emissions scenarios for the reports by the Intergovernmental Panel on Climate Change (IPCC).
…20 June 2007 at 10:01 am #4463
From the Guardian:Quote:In the last six years, the Chinese coal industry, with reserves put at more than 1 trillion tonnes, has doubled production to more than 1.2bn tonnes a year. The country is now building 550 coal-fired power stations – opening at the equivalent of two a week – and in the five years to 2005, electricity generation rose 150%.
But while the Chinese economy has tripled in size in a decade, it has been at the expense of carbon dioxide emissions, which were yesterday put at more than 6.2bn tonnes in 2006, compared to nearly 5.8bn tonnes for the US.
China is well aware of its impact on climate change. Its Himalayan glaciers are melting at an unprecedented rate, its deserts are encroaching on cities in the north-west, and rivers are drying up as a result of temperature rises and over-exploitation. According to the Worldwatch Institute thinktank in Washington, Chinese air pollution from coal-burning cost its economy more than $63bn (£31bn) in 2004, or roughly 3% of GDP.
But China argues that even with its surging economy, it is a relatively minor villain. The carbon footprint of the average Chinese last year was only a quarter of an American, or half that of a Briton.
· Energy efficiency plan proves hard to implement
· Chinese carbon footprint a quarter of an American’s24 October 2007 at 1:43 pm #4464
More grim news, in Scientific American website:Quote:The world may finally acknowledge that global warming is a major environmental hazard. But new research shows that reducing the main greenhouse gas behind it may be even more difficult than previously believed. The reason: the world’s oceans and forests, which scientists were counting on to help hold off catastrophic rises in carbon dioxide, are already so full of CO2 that they are losing their ability to absorb this climate change culprit.
“For every ton of CO2 emitted [into] the atmosphere, the natural sinks are removing less carbon than before,” says biologist Josep “Pep” Canadell, executive director of the Global Carbon Project—an Australia–based research consortium devoted to analyzing the pollution behind global warming. “This trend will continue into the future.”
Specifically, oceans and plant growth absorbed only around 540 kilograms per metric ton (1,190 pounds per short ton) of the CO2 produced in 2006, compared with 600 kilograms per metric ton (1,322 pounds per short ton) in 2000. Coupled with an emissions growth rate of 3.3 percent—triple the growth rate of the 1990s—the atmospheric burden is now rising by nearly two parts per million of CO2 a year, the fastest growth rate since 1850, the international team of researchers reports in Proceedings of the National Academy of Sciences USA.
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