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Practice Writing: Summarize Written Text ID: #749 Greenhouse Gases
Instructions
When an individual drives a car, heats a house or uses an aerosol hair spray, greenhouse gases are produced. In economic terms, this creates a classic negative externality. Most of the costs (in this case, those arising from global warming) are borne by individuals other than the one deciding how many miles to drive or how much hairspray to use. Because the driver (or sprayer) enjoys all the benefits of the activity but suffers only a part of the cost, that individual engages in more than the economically efficient amount of the activity.

This change in concentrations causes warming and is affecting various aspects of climate, including surface air and ocean temperatures, precipitation, and sea levels. Human health, agriculture, water resources, forests, wildlife, and coastal areas are all vulnerable to climate change. The greenhouse effect is the way in which heat is trapped close to surface by “greenhouse gases.” These heat-trapping gases can be thought of as a blanket wrapped around Earth, keeping the planet toastier than it would be without them.

In this sense, the problem of greenhouse gases parallels those that occur when someone smokes a cigarette in an enclosed space or litters the countryside with fast-food wrappers. If we are to get individuals to reduce production of greenhouse gases to the efficient rate, we must somehow induce them to act as though they bear all the costs of their actions. The two most widely accepted means of doing this are government regulation and taxation, both of which have been proposed to deal with greenhouse gases.
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Sample Answer 1

When an individual drives a car, heats a house or uses an aerosol hair spray, greenhouse gases are produced, and if we are to get people to reduce production of greenhouse gases to the efficient rate, we must somehow induce them to act as though they bear all the costs of their actions.

Sample Answer 2

Greenhouse gasses are produced in our daily activities and could create a negative externality, which means that most of the cost behind these actions are shouldered by a vast majority of innocent people, and therefore such behaviours can only be regulated through government regulation and taxation.

Explanation

When an individual drives a car, heats a house or uses an aerosol hair spray, greenhouse gases are produced, and if we are to get individuals people to reduce production of greenhouse gases to the efficient rate, we must somehow induce them to act as though they bear all the costs of their actions. -> Both lines are related to greenhouse gases.

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