GLOBAL WARMING EFFECT ON EARTH

GLOBAL WARM 

Earth's climate is changing. In the past 50 years, the average temperature in the United States has gone up by 2 degrees F, precipitation has increased by roughly 5 percent, and extreme weather events have become more frequent and intense, according to a recent report by the U.S. Global Change Research Program. Global warming doesn't just impact nature; your daily life is affected, too.

Food

Food prices are rising as climate change makes it trickier to maintain the specific conditions crops need to thrive. As the climate warms, the air holds more moisture and rainstorms become more intense, damaging crops. Overall precipitation patterns are also changing, bringing droughts to some areas of the world and floods to others. A recent study published by Stanford University showed that global wheat production decreased by 5.5 percent as a result of an unstable climate, and world corn production was down by nearly 4 percent. So far, North American farmers haven't seen the same drop in productivity, but that is expected to change. (See References 2) The EPA reports that an additional increase of 3.6 degrees F in the global temperature could decrease production of American corn by 10 to 30 percent .

Fresh Water

Fresh water is becoming scarcer in some regions. Many mountainous states rely on snow melt to replenish their water sources, and snowpack is declining as well as melting earlier in the season. Severe droughts, increased evaporation and changes in precipitation patterns are impacting water levels in streams, rivers and lakes. Nearly 18 percent of the world's fresh water is found in the Great Lakes, which supply drinking water to a large region. Scientists expect lake levels to drop as the climate continues to warm up. Lake Superior --- the largest of the five Great Lakes --- is 4.5 degrees F warmer than it was in 1980, and water levels in all of the Great Lakes have generally declined since 1986 .