How Cities Affect Climate
Definition of climate change:
|Main Entry: |climate change |
|Part of Speech: |n |
|Definition: |any long-term significant change in the weather patterns of an area |
|Example: |Climate change can be natural or caused by changes people have made to the land or atmosphere. |
As greenhouse gases build up, the earth’s climate is changing. Human activities are the cause of this. If this continues at this rate, droughts, floods and other types of extreme weather will become more constant and in turn could affect food supplies. There are many plants and animals that will not be able to adjust to these patterns and may become extinct. In addition to that, sea levels are continuing to rise and are causing thousands of people in areas around the coast to have to relocate. One of our main greenhouse gas emissions is carbon dioxide, CO2. Examples of natural greenhouse gases include water vapor, CO2, methane, and nitrous oxide. As a result of man made activities such as the burning of fossil fuels and deforestation, the amounts of all of these gases in our atmosphere has greatly increased. Forests are extremely vital as they assist in naturally removing carbon dioxide and other polluting gases from the air. The concentration of carbon dioxide in our atmosphere has increased by over 30% within the past two centuries and levels of methane have doubled.
In cities, many human activities have contributed to the amount of air pollution we have. There are two main sources of air pollution: anthropogenic sources (human activity) and natural sources. Most of the pollutants from human activity are directly related to burning different types of fuel. Smoke stacks from...