Answer to Question 1
The consequences of global warming include more frequent and intense weather events, melting of glaciers, permafrost, and arctic sea ice, with attendant flooding, especially in coastal areas. Severe droughts will cause some of the great food-producing regions of the world to dry up into dust bowls. Overall, disastrous extinctions of many species of plants and animals could occur.
Answer to Question 2
The hydrologic cycle is interfered with by various kinds of human pollution, including raw sewage, pesticides and other chemicals, nitrate and phosphate fertilizers, and waste products from factories and nuclear power generators. As population and technology have grown, the resulting pollution has become so massive that the hydrologic cycle cannot fully cleanse the water, although techniques
exist to assist nature in this process.
Ancient Warming Shrunk Horses to Housecat Size
Global Stratification: Income of the World's Nations
Global Stratification: Income of the World's Nations
A Global Bloom: Cities With Over One Million Residents
Ozone Depletion—A Global Issue
Global Water Stress