It's too hot ...
Yes, too hot for us, people
humans, we are so quiet. Because we are not
speaking only of an increase in temperatures, but
a global change that can be very dangerous.
But all is not so bad: the cause of this warming
is the very human activity. Therefore, for us
stop depends. Want to know how? Read on!
Between 1 and December 10, 1997, one hundred sixty countries met in Kyoto, Japan, to discuss
changes in the Earth's climate. But what
important is to know how many degrees will increase
room temperature, where it will rain more or why not
It snowed so much last year?
Much more than you can imagine. The climate is
union of many factors: sunlight, rainfall,
wind, temperature. The delicate balance
all that the earth has to develop
tobecome what it is now: a cozy planet
allows the lives of many animal and plant species,
What, for example, if the average temperature
Earth decreased by 5 degrees? It does not seem much, do not
right? Well, that happened about 15,000 years.
At that time, much of Europe and America
North were covered by ice for five thousand
years. No wonder that period is called theIce Age!
Currently, we face a new climate change
but this time caused by human activity. The
industry, automobiles, crops and large
support of livestock, particularly that which allows
survival of the five billion human beings
populate the planet, causing great changes. One
of them, perhaps most troubling, is the heating
Global Earth, caused by an increase in effect
emissions. The Industrial Revolution
Climatic changes of the Earth (as the Age of
Ice) are natural and gradual processes. Without
But in the 18th century began to change history. The
Man, now populated almost all parts of
world, increasingly needed food, clothing,
furniture, houses, roads ... They kept large flocks and
large tracts of cultivated land. And,
increase the production of allgoods, invented the
industry. Each year, new machines began
facilitate the work of man.
But these machines need energy to
work. To get this energy began to be used
fossil fuels: coal, oil and natural gas.
The engines ran on coal, light
many cities was obtained with gas lamps or
This century was called "Industrial Revolution", and
many thought would only bringbenefits to
humans. The problem was that when burning
fossil fuels, there were large amounts of
invisible gases that spread through the atmosphere. The
huge plantations, maintenance of animals and
clearing of forests also produce gases. What kind of
gases?: greenhouse gases.
Since the Industrial Revolution, and because of the demands
increasing energy and food needed by the
man, everyyear brings more and more gas
gases to the atmosphere. From the 18th century, the
their number has almost doubled and our
atmosphere is becoming more dense.
Now this is dangerous: a thicker atmosphere
means warmer air. This is not a process
natural but induced climate change being
human. According to scientists, the most likely outcome
is global warming: the temperature of theEarth
increase between 1.5 and 4.5 degrees Celsius within
next 100 years. You're going to live this change!
The Greenhouse Effect
The Earth's atmosphere is composed of many gases.
The most common are nitrogen and oxygen (this
The latter is the need to breathe). The remaining
less than one hundredth part, are gases so-called "
gases. "we can not see or smell, but they are there. Some of them are carbon dioxide, the
methane and nitrogen dioxide.
In small concentrations of greenhouse gases are
vital to our survival. When sunlight
reaching Earth, some of this energy is reflected in
the clouds, the rest passes through the atmosphere and reaches the
soil. Thanks to this energy, for example, plants
can grow and develop.
But not all the Sun's energy is...
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