Learning Task Global Warming, Global Concern
Learning Task Global Warming, Global Concern
Learning Task Global Warming, Global Concern
But why? And how? Well, scientists are not exactly sure.
The Earth could get warmer by itself, without help from people.
Many climate scientists think there is another reason for the change in
temperature.
They think that human activities like cutting down the trees, producing trash,
and burning fuels like coal and oil are helping make the Earth warmer.
Just because the weather has been hot for a month or two does not mean that
global warming has arrived.
But scientists think that as we use more gasoline and electricity, the Earth is
going to get warmer.
They believe that we know enough about the problem to take some action.
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The Greenhouse Effect: Scientists are sure about the greenhouse effect.
They know that greenhouse gases like carbon dioxide and methane make the
Earth warmer.
For example, it is possible that a winter day in a city could be sunny and mild,
but the average weather tells us that its winters will mainly be cold and
include snow and rain.
A warmer Earth may have results such as changes in rainfall patterns, a rise in
sea levels, and different effects on plants, wildlife, and humans.
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When scientists talk about climate change, they are concerned about global
warming caused by human activities.
We don’t know exactly what will happen - what the effects will be - nor do we
know exactly where or when they will make problems.
But it should be said that scientists have a pretty good idea of what is going to
happen.
Scientists and researchers from different fields tell us that the possible effects
of climate change could be big and, in some cases, would cause serious
problems.
Among the possible effects are increased number of human deaths, extinction
of groups of animals and plants, and a dangerous rise in sea levels.
With this in mind, we have to think of the costs of action and weigh them
against the risks of inaction.
If we try, most of us can do our part to reduce the amount of greenhouse gases
that we put into the atmosphere.
Many greenhouse gases coming from things we do every day trap energy in
the atmosphere and make the Earth warmer.
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2. Save electricity.
4. Plant trees.
1. Solar energy - energy that comes from the sun - can be used to heat homes,
buildings, water, and to make electricity.
2. Cars cause pollution and release many greenhouse gases into the air.
Driving cars that use less fuel can help reduce the amount of greenhouse gases
in the air.