GEOLOGY

Detailed explanation-1: -Nearly all actively publishing climate scientists say humans are causing climate change. Surveys of the scientific literature are another way to measure scientific consensus.

Detailed explanation-2: -The greenhouse gases contribute to the greenhouse effect by absorbing infrared radiation from the piles of the earth’s surface. Climate scientists believe that the enhancement of the greenhouse effect is the major cause of climate change on earth.

Detailed explanation-3: -Fossil fuels – coal, oil and gas – are by far the largest contributor to global climate change, accounting for over 75 per cent of global greenhouse gas emissions and nearly 90 per cent of all carbon dioxide emissions.

Detailed explanation-4: -We already see effects scientists predicted, such as the loss of sea ice, melting glaciers and ice sheets, sea level rise, and more intense heat waves. Scientists predict global temperature increases from human-made greenhouse gases will continue. Severe weather damage will also increase and intensify.

Detailed explanation-5: -The answer to the question, “Is global warming real?” is yes: Nothing other than the rapid rise of greenhouse gas emissions from human activity can fully explain the dramatic and relatively recent rise in global average temperatures. Click here to see all climate change videos from National Geographic.