What is global warming 1minute speech
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Good morning to my respected teachers and my dear friends, I would like to speech on the topic of global warming today. Global warming is mainly caused by the increasing concentration of greenhouse gases in the earth’s atmosphere. Some of the greenhouse gases are CO2, water vapour, methane, nitrous oxide and ozone. When these gases get collected to the lower environment, it makes a cover which easily allows all the hot radiations of sun to the earth however restrict its escape back to the space. This process is called as the Green House Effect. Such gases in the atmosphere trap hot radiations and keep earth warm by increasing temperature.
The level of green house gases also raise because of the human activities such as burning trees, burning fissile fuels, electric lights, use of refrigerator, microwave, air conditioner, and other electric machines. Such process releases high percentage of carbon dioxide and other green house gases into the atmosphere causing the earth temperature to rise. Rise in heat causes more water from earth to evaporate into atmosphere, water vapour again absorbs more heat and makes earth atmosphere warmer. Global warming has changed natural processes rainfall patterns, length of seasons, rise of sea level, ecology balance and many more. It is a powerful demon affecting our lives to a great extent so it needs to be solved on urgent basis by the effort of all of us.
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