Climate Change

Climate changes can be short-term or long-term.
Seasons are an example of short-term climate change
Ice Ages are long-term climate change
Ice age is a period of extensive glacial coverage
The average global temperature decreases by approximately 5 °C (9° F)
The last ice age occurred about 10,000 years ago

El Niño: a warm ocean current that occasionally develops off the western coast of South America
Brings violent storms to California and the Gulf Coast
Fewer hurricanes in the Atlantic Ocean

Natural Causes of Climate Change
Earth's orbit and tilt
Solar activity
Increased solar activity coincides with warmer than normal climates
Decreased solar activity coincides with cold climatic conditions
Volcanic Activity
Cloud dusts from volcanoes can decrease temperatures across the globe
Impacts livestock and crop production, and ultimately, humans
The dust particles interact with the sun's rays, resulting in decreased temperatures

Human Causes of Climate Change
Greenhouse Effect
Natural heating of Earth's surface caused by atmospheric gases
Increased gases might cause increase in Earth's temperature
Carbon dioxide emissions can lead to global warming

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