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Politics : PRESIDENT GEORGE W. BUSH -- Ignore unavailable to you. Want to Upgrade?

To: J_F_Shepard who wrote (290303)	8/25/2002 11:01:21 PM
From: ManyMoose	Read Replies (1) \| Respond to of 769670

My comment was from field observations. Old growth has a lot of dead wood and other decaying vegetable matter, thus consuming oxygen and emitting CO2. Managed second growth sequesters carbon rapidly through photosynthesis, where it ends up as wood and eventually gets incorporated into your house, where hopefully it will stay for a very long time. Here is a link to a conference on the subject. You will find a lot of information here, but be forewarned it is a very complex subject and the variables are so vast that you could probably shoot down any one of these theories by taking a different approach. nofc.forestry.ca Using InTEC, we attempted to estimate the maximum carbon offset potentials of four alternative forest management strategies in Canada under different climatic and disturbance scenarios. These were: 1) afforesting in 1999 all of the estimated 7.2 Mha of marginal agricultural lands and urban areas available for tree planting; 2) implementing a program of afforesting all disturbed areas within one year of disturbance; 3) nitrogen fertilization of the 125 Mha of semi-mature forests at the low rate of 5 kg N ha-1 yr-1; and 4) increasing forest harvest 20% above current average rates and using the extra wood products to substitute for fossil energy after 1999. If implemented to the maximum extent, the combined net carbon offset potential, after sub-tracting the carbon costs of implementing these strategies, could be as much as 100 ± 50 Tg C yr-1 in 2010, increasing to 160 ± 80 Tg C yr-1 by 2050. The simulations indicated that nitrogen fertilization and reforestation strategies would be the two largest contributors to the combined net carbon offset potential.