Greenhouse Effect, Climate Change and Global Warming
Earth has warmed by about 1ºF
over the past 100 years. But why? And how? Well, scientist are not
exactly sure. The Earth could be getting warmer on its own, but many of
the world’s leading climate scientists think that things people do are
contributing to make the Earth warmer…..
is a term used to describe a gradual increase in the earth’s average
ground and atmospheric temperatures across the whole planet.
Measurements indicate that the global temperature has increased by
about 1 degree Fahrenheit in the past century. A warmer Earth may lead
to changes in rainfall patterns, a rise in sea level, and a wide range
of impacts on plants, wildlife, and humans.
When scientists talk about the issue of climate change, their concern is about global warming caused by human activities…….
Earth is wrapped in a blanket of air called the 'atmosphere', which is
made up of several layers of gases. The sun is much hotter than the
Earth and it gives off rays of heat (radiation) that travel through the
atmosphere and reach the Earth. The rays of the sun warm the Earth, and
heat from the Earth then travels back into the atmosphere. The gases in
the atmosphere stop some of the heat from escaping into space.
gases are called greenhouse gases and the natural process between the
sun, the atmosphere and the Earth is called the 'Greenhouse Effect',
because it works the same way as a greenhouse. The windows of a
greenhouse play the same role as the gases in the atmosphere, keeping
some of the heat inside the greenhouse.
Natural Green House Effect………
Earth’s atmosphere is all around us. It is the air that we breathe.
Greenhouse gases in the atmosphere behave much like the glass panes in
a greenhouse. Sunlight enters the Earth's atmosphere, passing through
the blanket of greenhouse gases. As it reaches the Earth's surface,
land, water, and biosphere absorb the sunlight’s energy. Once absorbed,
this energy is sent back into the atmosphere. Some of the energy passes
back into space, but much of it remains trapped in the atmosphere by
the greenhouse gases, causing our world to heat up.
To make sure that the Earth's temperature remains constant, the balance of these gases in the atmosphere must not be upset.
THE ENHANCED GREENHOUSE EFFECT
all climate changes used to occur naturally. However, during the
Industrial Revolution, we began altering our climate and environment
through agricultural and industrial practices. The Industrial
Revolution was a time when people began using machines to make life
easier. It started more than 200 years ago and changed the way humans
the Industrial Revolution, human activity released very few gases into
the atmosphere, but now through population growth, fossil fuel burning,
and deforestation, we are affecting the mixture of gases in the
atmosphere. A group of greenhouse gases called the
chlorofluorocarbons’, which are also called CFC’s have been used in
aerosols, such as hairspray cans, fridges and in making foam plastics
are dangerous greenhouse gases because small amounts can trap large
amounts of heat.
When Do You Send Greenhouse Gases into the Air?
Whenever you ...
· Watch TV
· Use the Air Conditioner
· Turn on a Light
· Use a Hair Dryer
· Ride in a Car
· Play a Video Game
· Listen to a Stereo
· Wash or Dry Clothes
· Use a Dish Washer
· Microwave a Meal
... you are adding to send greenhouse gas into the air which impacts the environment negatively.
global temperature has increased by almost 1ºF over the past century;
scientists expect the average global temperature to increase an
additional 2 to 6ºF over the next one hundred years. This may not sound
like much, but it could change the Earth's climate as never before.Even
a small increase in temperature over a long time can change the
climate. When the climate changes, there may be big changes in the
things that people depend on. These things include the level of the
oceans and the places where we plant crops. They also include the air
we breathe and the water we drink.
What Might Happen?
change may affect people's health both directly and indirectly. For
example, heat stress and other heat related health problems are caused
directly by very warm temperatures and high humidity. Untreated, heat
stress can be a very serious medical problem. Indirectly,
ecological disturbances, air pollution, changes in food and water
supplies, and coastal flooding are all examples of possible impacts
that might affect human health.
Scientists suspect that, in many places, climate change will increase the number of very hot days that occur during the year. In
different parts of the world, the effects will be different, some
places will become drier and others will be wetter. Although most areas
will be warmer, some areas will become cooler. There may be many
storms, floods and drought, but we do not know which areas of the world
will be affected. All over the world, these weather changes will affect
the kind of crop that can be grown.
change may alter the world's habitats and ecosystems – all living
things are included in and rely on these places. Many of these places
depend on a delicate balance of rainfall, temperature, and soil type. A
rapid change in climate could upset this balance and seriously endanger
many living things. Most
past climate changes occurred slowly, allowing plants and animals to
adapt to the new environment or move somewhere else. However, if future
climate changes occur as rapidly as some scientists predict, plants and
animals may not be able to react quickly enough to survive.
warming may make the sea level become higher. Why? Well, warmer weather
makes glaciers melt. A glacier is a large sheet of ice that moves very,
very slowly. Some melting glaciers add more water to the ocean. Warmer
temperatures also make water expand. When water expands in the ocean,
it takes up more space and the level of the sea rises. Sea
level may rise between several inches and as much as 3 feet during the
next century. This will affect both natural systems and manmade
structures along coastlines. Coastal flooding could cause saltwater to
flow into areas where salt is harmful, threatening plants and animals
in those areas.
Oceanfront property would be affected by flooding, and beach erosion could leave structures even more vulnerable to storm waves.
changes in the weather will affect the types of crops grown in
different parts of the world. Some crops, such as wheat and rice grow
better in higher temperatures, but other plants, such as maize and
sugarcane do not. Changes in the amount of rainfall will also affect
how many plants grow. Change also might bring droughts to other places
where we grow crops.
has taken million of years for life to become used to the conditions on
Earth. As weather and temperature changes, the homes of plants and
animals will be affected all over the world. For example, polar bears
and seals will have to find new land for hunting and living, if the ice
in the Arctic melts. Many animals and plants may not be able to cope
with these changes and could die. This could cause the loss of some
animal and plant species in certain areas of the world or everywhere on
change may be a big problem, but there are many little things we can do
to make a difference. 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 come from things
we do every day. Driving a car or using electricity is not wrong. We
just have to be smart about it. Some people use less energy by
carpooling. For example, four people can ride together in one car
instead of driving four different cars to work. Here are some
additional ways you can help make the planet a better place!
about the environment is very important. There are many good books that
will help you learn. To get started, ask our CSR team or a librarian
for some suggested books / articles. You also can look at the Links
page to find other good web sites with information about the
environment and climate change.
Save Electricity: Whenever
we use electricity, we contribute in putting greenhouse gases into the
air. By turning off lights, the television, and the computer when you
are through with them, you can help a lot.
Using public transport or Walk: You can save energy by sometimes taking a public transport like train or bus, or walking.
Talk to Your Family and Friends: Talk with your family and friends about climate change. Let them also know what you've learned.
Plant Trees: Planting trees is fun and a great way to reduce greenhouse gases. Trees absorb carbon dioxide, a greenhouse gas, from the air.
cans, bottles, plastic bags, and newspapers. When you recycle, you send
less trash to the landfill and you help save natural resources, like
trees, oil, and elements such as aluminum.
When You Buy, Buy Cool Stuff: Buy
products that don't use as much energy. By conserving energy, we help
reduce climate change and make the Earth a better place. Some products
– like certain cars and stereos – are made specially to save energy.
Buy recyclable products instead of non-recyclable ones. Look for the
recycle mark – three arrows that make a circle – on the package.
Recyclable products are usually made out of things that already have
been used. It usually takes less energy to make recycled products than
to make new ones. The less energy we use, the better.
Solar Energy: Solar
energy is a fancy way of saying "energy that comes from the sun." Solar
energy can be used to heat homes, buildings, water, and to make
electricity. Today, more than 200,000 houses in the United States take
advantage of the sun's energy.
things, like computers, TVs, stereos, and DVD players, refrigerators
have special labels on them. The label says "Energy" and has a picture
of a star. Products with the ENERGY STAR® label are made to save
energy. Buying products with ENERGY STAR® labels will help protect the
So….Think Green and help save environment…….