二氧化碳排放量加速

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  • #3428
    馬丁
    參與者
      引用:
      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).

      Carbon Emissions Exceed Highest Assumptions Used in Climate Change Studies

      #4463
      馬丁
      參與者

        來自衛報:

        引用:
        過去六年,中國煤炭工業的儲量超過1兆噸,產量翻了一番,年產量超過12億噸。該國目前正在建造 550 座燃煤發電站——相當於每週開工 2 座——在截至 2005 年的五年裡,發電量增加了 150%。

        然而,儘管中國經濟規模在十年內增加了兩倍,但卻是以二氧化碳排放量為代價的,昨天預計2006年二氧化碳排放量超過62億噸,而美國的二氧化碳排放量接近58億噸。

        中國很清楚其對氣候變遷的影響。喜馬拉雅冰川正在以前所未有的速度融化,沙漠正在侵蝕西北部的城市,河流因氣溫上升和過度開發而乾涸。據華盛頓世界觀察研究所智庫稱,2004年,中國因燃煤造成的空氣污染造成的經濟損失超過$630億(310億英鎊),相當於GDP的約3%。

        但中國辯稱,即使其經濟蓬勃發展,它也只是一個相對較小的惡棍。去年中國人的平均碳足跡僅為美國人的四分之一,或英國人的一半。

        隨著冰川融化和河流乾涸,燃煤發電廠倍增

        · 能源效率計畫實施難
        · 中國的碳足跡是美國人的四分之一

        #4464
        馬丁
        參與者

          More grim news, in Scientific American website:

          引用:
          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.

          Climate Change Pollution Rising—Thanks to Overwhelmed Oceans and Plants

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