Top of Page The causes are mainly from us, the human race, and the effects on us will be severe. But Venus has about 154,000 times as much carbon dioxide in its atmosphere as Earth (and about 19,000 times as much as Mars does), producing a runaway greenhouse effect and a … The warming effect associated with carbon dioxide alone increased by 30 percent. Because of the low atmospheric pressure, and with little to no methane or water vapor to reinforce the weak greenhouse effect, Mars has a largely frozen surface that shows no evidence of life. Increase in Population. The facts about global warming are often debated, but unfortunately, even if we disagree about the causes, global warming effects are real, global, and measurable. Too much greenhouse effect: The atmosphere of Venus, like Mars, is nearly all carbon dioxide. You can feel the effect directly by holding your hand over dark asphalt or your car’s hood on a warm, sunny day. Greenhouse Effect on a larger scale causes Global Warming. The actual rise is not very much, but the Earth’s ecosystem is very fragile, and small changes can have large effects. Burning of Fossil Fuels. Overview. * Land Use, Land-Use Change, and Forestry in the United States is a net sink and offsets approximately 11 percent of these greenhouse gas emissions… The greenhouse effect causes trouble by raising the temperature of the planet. Climate change is caused by both natural factors and human activities. When it strikes surfaces or gases that can absorb it, heat is emitted. Total Emissions in 2017 = 6,457 Million Metric Tons of CO 2 equivalent.Percentages may not add up to 100% due to independent rounding. Sunlight passes through the atmosphere. 3. The Greenhouse Effect. Effects of Greenhouse Gases on Climate Change. Total Emissions in 2017 = 6,457 Million Metric Tons of CO 2 equivalent. Greenhouse effect, a warming of Earth’s surface and troposphere (the lowest layer of the atmosphere) caused by the presence of water vapour, carbon dioxide, methane, and certain other gases in the air.