送交者: Enlighten 于 2005-12-05, 11:58:33:
回答: 吹吧吹吧，林业部说，经过50的砍伐，我国森林覆盖率从解放初期的5%上升到目前的20% 由 炎阳 于 2005-12-05, 11:22:08:
中国这个雷锋看来是自己封的。而且，文章的最后，独立专家说数据是各国提供的，
可靠性参差不齐，还需要用卫星摄像验证。这个国内也没有翻译，故意让中国人认
为是联合国的数据？
哈哈，这算不算造假？
China Is Bright Spot in Dark Report on the World's Diminishing Forests
Source: Copyright 2005, New York Times
Date: November 15, 2005
Byline: ANDREW C. REVKIN
Widespread tree planting in China has slowed the rate at which the earth's
forested area is dwindling, but the clearing of tropical forests, much of
it in areas never previously cut, continues to grow, according to a new
United Nations report.
The study was published yesterday by the United Nations Food and Agriculture
Organization, based in Rome, and is online at fao.org/forestry.
"While good progress is being made in many places, unfortunately forest
resources are still being lost or degraded at an alarmingly high rate,"
said Hosny El-Lakany, assistant director-general of forestry for the food
and agriculture agency.
The slowing rate of forest loss is encouraging, some forest experts say,
but biologists contend that most acreage gained by plantation forestry contains
a fraction of the plant and animal diversity destroyed with virgin forests.
Forest cover has generally been expanding in North America, Europe and China
and diminishing in the tropics.
The report said that worldwide just over 50,000 square miles of forest -
an area a bit smaller than New York State - had been cleared or logged annually
since 2000. Nearly half of that annual loss affected tracts with no evidence
of previous significant human use, the report said.
In the report, which compared forest trends over the last five years with
those through the 1990's, South America passed Africa in net annual loss
of forests (the difference between areas added as plantations and lost through
cutting or burning).
Much recent clearing in South America has occurred in the southern Amazon
basin, where jungle is rapidly being converted to pasture and farmland,
especially soybean fields, the report said.
Asia has seen an extraordinary turnaround in a decade: it lost about 3,000
square miles of forest a year in the 90's but gained nearly 4,000 annually
since 2000, said Mette Loyche Wilkie of the F.A.O. But almost all of that
change has occurred because of China's new forest policy, she said. Tropical
forests elsewhere in Asia are still being cleared at a rising pace, the
report said.
Several independent forest experts said the study was a valuable rough estimate
of global trends, but cautioned that it was generated using data provided
by countries with widely varying track records in monitoring deforestation.
"The F.A.O. is doing the best it can given what the governments are providing,
" said Mila Alvarez, who tracks forest trends for World Resources Institute
and Global Forest Watch (globalforestwatch.org). She said they and other
groups were preparing to develop a way to use satellite imagery to analyze
forest changes and to verify government estimates.