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1 We don’t have to create
greenhouse gases; they ____exist
_____ naturally.
2 Greenhouse gases in the
atmosphere _________ the greenhouse effect.
3 Global warming is the _________
of an increase in the amount of greenhouse gases.
4 Two _________ of climate
change have been hotter summers and wetter winters.
5 A _________ is often the
result of too much rain when the rivers are full.
6 A _________ is a long
period without rain, and they are _________ more frequently now.
7 The _________ is the air,
land and water around us.
8 If you _________ something,
it is so badly damaged, it cannot be used again.
9 If something is _________,
it works well and doesn’t waste energy.
10 _________ is the power
that comes from gas, electricity, etc.
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