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For what people cut trees?
To make furniture , To burn as a fuel , To clear land for farming , To clear land for cities , To clear land for mining.
Why trees are important ?
Because they take carbon dioxide and releas oxygen.
When deforestation happen ?
Deforestation happens when people destroy forest by cutting tress.
One city planner says : The city is expanding, we need to clear more land . Those is in favour or against of deforestation ?
In favour of deforestation.
What is deforestation ?
Deforestation is the process by cutting trees .
Our atmosphere consists mainly of two gases . How are called ?
Nitrogen and oxygen .
How people pollute our atmosphere ?
They pollute with particles of other gases.
What are the diseases that air pollution causes ?
Asthma and bronchitis .
How does air pollution affect in our health ?
Breathing in polluted air is very bad for us and some disease .
Why new cars are less polluting than older ones ?
Because in older cars is a device that changes exhaust gases to carbon dioxide .
What is ozone ?
Ozone is a greenhouse gas that it can be good and bad.
How is created smog ?
When particles in the air combine with ozone , they crate smog.
