What is climate change ?
Changes in the climate of different areas of
the planet. These changes can be seen in precipitations, winds, storms…
All elements of weather can be affected.
Why is the planet heating up ?
The planet is heating up because of the increased
effects of greenhouse gases.
What is the greenhouse effect ?
Around our planet, there is a layer of gases
that act like the windows of a greenhouse or a car. This layer is composed
of greenhouse gases - carbon dioxide, methane, nitrous oxide. Like the
windows of a greenhouse, many solar rays are able to get through the
layer of gases. The solar rays then hit the planet and bounce back towards
the atmosphere. Some of the rays get through the layer and return into
space. However, some rays are trapped inside the layer because it is
getting thicker with human production of greenhouse gases. A greenhouse
heats up in the same way, which explains the reason why scientists call
this the greenhouse effect.
Source : Environment Canada
The greenhouse effect is a natural phenomenon
and without it, the temperature on Earth would be -18 degrees Celsius.
However, this phenomenon has been increased in the last few years and
it helps to explain the warming of the Earth.
What are the causes of climate change ?
Changes in the climate can occur naturally on
the planet over a long period of time, for example the ice ages. They
can also be caused by human activity. These modify the atmosphere's
composition of greenhouse gases. The concentration of carbon dioxide,
nitrous oxide and methane is rising rapidly because of :