摘要: |
1.1Three indicators commonly used to describe global climate change trends are: rise in the concentrations of greenhouse gases in the atmosphere, rise in the global and regional temperatures, and rise in the sea level. Although uncertainties exist in the way the data are interpreted, there is generally little disagreement about these trends and a growing consensus seems to be emerging that it is the human activity that is a significant cause! 1.2 According to the United Nation's Inter-governmental Panel on Climate Change: "increasing amounts of anthropogenic greenhouse gases may result in increased tropical sea surface temperatures which could lead to more frequent and intense hurricanes, typhoons and severe tropical cyclones." 1.3 Severe storms can produce a number of adverse conditions year round. Torrential rains can induce roadway flooding. High winds and tornadoes can produce devastation by toppling trees and bringing down power lines. Large hail storms can damage property and lightning can affect power grids and cause fires. |