Global warming
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Since the industrial revolution,humans have been building factories
and machines that give out gases such as carbon dioxide(co2).
These gases change the atmosphere and increase the greenhouse
effect. More and more rays get trapped and the Earth heats up.
Glass greenhouses are used for planting plants that need heat to
grow up. The Earth’s greenhouse is its atmosphere. It is a layer of gases
that surrounds the Earth and keeps the heat in.
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