It's time to get rid of this old sweater.
It is difficult to get rid of insects.
Eco-friendly
[Adjective]
(not or less harmful or damaging to the
environment).
The government encourage people to use eco-friendly products or services.
For environmentally conscious people, it is very easy to use eco-friendly
products and organic food.
Emit
[Verb]
(to produce and discharge something, like gases or radiation
for example).
When the volcano exploded, it emitted clouds of gases and smoke into the
air.
It is predicted that trucks will produce about 23 tons of CO2 and vans will
emit 15 tons.
Global warming
[Noun]
(the gradual increase in temperature of the
atmosphere of the Earth caused by high levels of carbon dioxide and other
gases in the atmosphere).
Greater use of renewable energy resources is necessary in order to combat
global warming.
Global warming has become a real problem for the earth.
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