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US, China biggest threat to environment

United States is the biggest culprit responsible for the green house emission. China is also fast developing and going to exceed US by 2009. India is equally developing fast but environment degradation here is slower, said Edward R Cook from Lamont Doherty Earth Observatory of Columbia University, USA. Doherty was delivering his lecture on the second day of the Diamond Jubilee International Conference organised by Birbal Sahni Institute of Palaeobotany on Thursday.

india Updated: Nov 17, 2006 01:49 IST
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United States is the biggest culprit responsible for the green house emission. China is also fast developing and going to exceed US by 2009. India is equally developing fast but environment degradation here is slower, said Edward R Cook from Lamont Doherty Earth Observatory of Columbia University, USA. Doherty was delivering his lecture on the second day of the Diamond Jubilee International Conference organised by Birbal Sahni Institute of Palaeobotany on Thursday.    

Talking about climatic changes from tree rings in India, Cook said that changes in the green house warming are expected to increase the impact in the Indian subcontinent in the coming future. Although these changes are unavoidable, it is still important to understand the range of natural climate variability in India over the past several centuries to millennia, especially to the Southwest Monsoon, he further added.

One of the best sources of Palaeoclimatic information comes from the exactly dated annual growth rings of long-lived trees. Climate reconstruction from such records can be used to determine how past climate variability has impacted societies and human activities. The identification of important new long live tree species suitable for dendroclimatic research in India may lead to major breakthrough in the reconstruction of past climate over the subcontinent, added Cook.