May 21, 1999

Greenhouse Effect Predicted to Increase Growth of Pine Trees

By DAVID L. WHEELER

Scientists have found that an artificial rise in carbon dioxide increases the growth rate of loblolly pine trees by 26 per cent, a far greater jump than many researchers had predicted.

The scientists conducted their experiments in a young forest and said that the increased growth of the trees may represent an upper limit for how trees would respond to an increase in carbon dioxide. But if such an increase in

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