higher acidity, but finally only the strong survive. Even soil that absorbs acid rain affects life. The birds that are fed from acidic soil may die. Solutions to this problem is being tested in many parts of the world ( Sandak pg. 26 ). Global warming through greenhouse effect can have a major impact on earths ecology. The gases that cause greenhouse effects are: carbon dioxide, CFCs, nitrogen oxides, and methane. These are known as greenhouse gases. Of these four gases, carbon dioxide accounts for more then 50% of greenhouse effect ( Sandak pg. 63 ). With the steady build-up of the greenhouse gases, the average worldwide temperature has risen about 1 degree Fahrenheit over the past 100 years. If the greenhouse gases continue to accumulate at the present rate, including the earths natural increase of temperature, scientists predict that the average temperature will increase dramatically in a short time ( Gay pg. 45 ). Global warming may cause more drought in certain areas and increased precipitation in other areas. Alterations in precipitation patterns can effect water supply and distribution, changing where crops grown and animals raised. Another expected impact of global warming is a rise in sea level brought by ice and snow melting that run off into the ocean. Scientists believe that oceans could expand thermally and warming could reduce water density and increase volume. Warmer oceans could bring about more severe hurricanes and other violent storms. Higher sea levels would erode or inundate shorelines, destroying homes, businesses, roads, and ports worldwide. Rising sea levels would also force salt water into lakes, rivers, streams, and groundwater sources. This will affect our supply of drinking water ( Gay pg. 48 ).The impact of ozone depletion is of great concern to everyone. the ozone depletion process begins when CFCs and other ozone-depletion substances ( ODS ) are allowed to be released in the atmosph...
