ATTRIBUTION OF GLOBAL warming refers to the recent effort to scientifically prove the cause of the warming effect. Many factors can cause changes in the Earth's heat balance, and changes large enough to cause major episodes of warming and cooling have taken place many times in the Earth's past. One cause of change of great concern to scientists is the amount of heat-absorbing gas in the atmosphere. Carbon dioxide, water vapor, and several secondary gases absorb thermal infrared radiation released from the Earth's surface and the lower atmosphere.
Greenhouse effect is the phrase for when a planet's atmosphere and surface are warmed by the absorption and emission of infrared radiation of atmospheric gases. When absorption takes place, the gas molecules take on heat and air temperature rises. If the atmosphere is heavy with water vapor and carbon dioxide, then heat tends to be retained in roughly the same way as the glass of a greenhouse contains longwave infrared radiation and heat. Hence, greenhouse effect is commonly used to describe the role of carbon dioxide (CO2) and H2O vapor and various secondary gases in holding heat within the atmosphere.
To illustrate the importance of the greenhouse effect, scientists estimate that if it were eliminated, the Earth's equilibrium surface temperature would fall 59 degrees F to 0 degrees F (33 degrees C to minus 18 degrees C). Global warming is one of the specific examples of climate change, referring to recent warming, and implying a human influence. Global warming is the status quo of the increasing average temperature of the Earth's near-surface air and oceans. It also refers to its projected continuation.
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Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable. The usage of renewable energy sources is very important when considering the sustainability of the existing energy usage of the world. While there is currently an abundance of non-renewable energy sources, such as nuclear fuels, these energy sources are depleting. In addition to being a non-renewable supply, the non-renewable energy sources release emissions into the air, which has an adverse effect on the environment.