Historical film analysis - Essay Example

Human activity is one of the major external causes of climate change. The rising levels of aerosols and the polluted air released from manufacturing activities of cement and other environmental harmful products are among the top causes of climate change. Animal farming and deforestation activities affect climate because the surface is left exposed to extreme radiation. Other factors are poor land use, and depletion of the ozone layer. The earth’s orbit also has some variations which cause changes in the climate conditions.

These changes affect the distribution of sunlight to the earth’s surface. Industrial activities carried out by modern technology and developments have led to increase in the level of carbon dioxide over the years. The earth’s temperature has been increased by man-made green houses through releasing gases like carbon dioxide, nitrous oxide and methane. The green houses also release water vapor, which contributes to the green house effect by increasing the warmth of the atmosphere. Nitrous oxide gas is a product of soil cultivation in the greenhouses, and is also another cause of climate change because it contributes to the green house effect.

Volcanic reactions are part of the external causes of climate change. These release gases and other harmful substances into the atmosphere. After a volcanic reaction has occurred, the earth’s surface is blocked from getting the sun’s radiation because of the cooling that takes place for several years. One of the eruptions that caused climate change is the eruption of Novarupta which was the largest eruption in 1912, followed by the eruption of Mount Pinatubo which was the second largest eruption in the 20th century.

The carbon cycle involves volcanoes because they release large amounts of carbon dioxide from the earth’s crust and other carbon dioxide sources. Variation in the solar energy is another cause of climate change. Changes or variations in the solar output lead to the