Some gases present in the atmosphere contribute to maintaining the temperature of the Earth's atmosphere.i. Indicate the name given to this effect. The greenhouse effect. ii. Name two gases that have this effect. Methane and carbon dioxide are both gases that have this effect on Earth's atmosphere. iii. Describe the means by which this effect is achieved. Greenhouse gases absorb certain wavelengths of infrared radiation emitted by the Sun to achieve the greenhouse effect. iv. It is feared that human activity threatens to lead to increased warming of the Earth's atmosphere.a) State the name given to this effect.The enhanced greenhouse effect.b) Explain three ways in which human activity may have this effect.1. Humans can emit carbon dioxide from burning fossil fuels when they use vehicles to transport, produce energy or burn rainforests2. Humans can also emit methane, another greenhouse gas, when they grow rice or raise cattle and sheep, through the anaerobic decomposition of plant material.3. Another human activity that can cause an increase in the greenhouse effect is through the use of nitrogen fertilizers in agriculture, which emit nitrous oxide from the reduction of nitrates by microbes.c) State two possible consequences of this global warming. Two possible consequences of this global warming include shrinkage of the total area and thickness of sea ice and a change in precipitation patterns.v. This question requires research to assist in developing your answer. You can use the Internet to formulate your answer. Please remember to provide the URL of the pages used to assist you in responding. In some parts of the world, forests are being cut down on a large scale. The tr...... middle of paper ......interpreted as a positive consequence of global warming. This is because most plants thrive on carbon dioxide and generally grow more efficiently in warm temperatures (Top 5 “Positive” Effects of Global Warming, 2008). Therefore, a prolonged period of warm weather will mean that there will be more food and crops produced, which will consequently result in a growing economy, and will be particularly beneficial for farmers, who will have a higher income. As is evident, the increase in greenhouse gases in the atmosphere can have both positive and negative consequences for humans and the environment. Works Cited • http://www.scientificamerican.com/article/climate-change-is-altering-rainfall- pattern-worldwide/• http://www.climatehotmap.org/global-warming-effects/plants-and- animals.html• http://scribol.com/science/the-top-5-positive-effects-of -global warming/4