排序方式: 共有7条查询结果,搜索用时 140 毫秒
1
1.
Jan Materna 《Environmental monitoring and assessment》1989,12(3):227-235
One third of the territory of Czechoslovakia is covered by forests. A substantial part of them is damaged in various degrees by air pollution. The air pollution influence on forests developed to a very serious problem during the last 40 years. The main pollutant at present is SO2 acting directly, but the improtance of soil changes due to acid deposition increases. The consequences are increased mortality and decreased increment in the forests, further consequences are the loss of valuable ecotypes, impact on water management and decreased stability of the landscape. There are limited possibilities of the forest sector to reduce the consequences.Contribution from Fourth World Wilderness Congress—Acid Rain Symposium, Denver (Estes Park), Colorado, September 11–18, 1987. 相似文献
2.
3.
4.
5.
6.
The Science of Nature - 相似文献
7.
1