发布网友 发布时间:2022-05-19 13:49
共1个回答
热心网友 时间:2023-10-12 20:57
1, human activity has caused great threat to the sea. The first is the change and damage to the environment, for example, the expansion of the city and the development of tourism has changed the coastline. The second is the serious pollution, for example discharge sewage and instrial proction of harmful substances into the sea. What's worse with the oil spill and the nuclear events. Many precious is the threat of another important species are disappearing like coral reefs (gone) to rece the number of dolphins, sea lions. Although human activities caused great threat to the sea, but human beings have realized the problem and trying to improve it.