what are the natural causes of warming and unnatural causes of warming
Causes of Global Warming: the Human impact Greenhouse gases have risen sharply since 1958, primarily due to the Industrial Revolution. Since the dawn of the Industrial Revolution, humans have increasingly been contributing unnatural sources of greenhouse gases into the system, causing the system to become unbalanced. Contents [hide] The Greenhouse Effect Anthropogenic Causes of Global Warming Carbon Dioxide Human sources of carbon dioxide.
Both natural and human factors contribute to global warming, however, evidence 3 has shown that the warming we are currently witnessing is largely as a result of human forcing. According to the Union of Concerned Scientists 4, there are several indications that provide evidence that humans are the cause of global warming rather than it being due to natural variability â these indicators include: Warming Oceans. Oceans have absorbed 20 times more heat than the atmosphere resulting in warmer oceans 5, 6.
Global Warming: A Natural Process The Earthâs current CO2 level is at 393.84ppm (CO2now, 2013). This is the highest of the high levels in the past 450,000 years. Extra carbon dioxide in the air is believed to keep temperatures steady and contributing to the greenhouse effect which causes the planet to warm.