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Process climate changegreenhouse gasessolar energy Graph #143
Academic Writing Task 1

You should spend about 20 minutes on this task.

The following diagram shows how greenhouse gases trap energy from the Sun. Write a report for a university lecturer describing the information shown in the diagram.

Process: Greenhouse gases trapping energy from Sun process

Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

Write at least 150 words.

One box per paragraph, then compare with Band 9.
161 words · 4 paragraphs
Introduction

The provided illustration elucidates the process through which solar energy is trapped by greenhouse gases.

Overview

At a general level, the diagram presents a two-step process. Initially, the sun's energy reaches the earth, and subsequently, this energy is either reflected back into space or trapped by greenhouse gases, contributing to global warming.

Body 1

In the first stage, the sun emits energy, which travels to the earth. Some of this energy is reflected back into space by the earth and the atmosphere, while a significant portion is absorbed by the earth's surface. This absorbed energy is then released back into the atmosphere as heat.

Body 2

In the second stage, greenhouse gases play a crucial role. These gases, which include carbon dioxide, methane, and nitrous oxide, trap some of the heat that would otherwise escape into space. This trapped heat causes the temperature of the earth's surface to rise, leading to a phenomenon known as the greenhouse effect, which is a significant contributor to global warming.

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