The document discusses the greenhouse effect and its causes and impacts. It begins by defining a greenhouse as a structure for growing plants and traces the history of greenhouses back to Roman times. It then explains that the greenhouse effect occurs naturally, trapping heat from the sun within the atmosphere due to greenhouse gases like water vapor and CO2. However, human activities like burning fossil fuels have increased CO2 levels and are enhancing the greenhouse effect, causing the planet to warm. Some impacts of this global warming include melting ice caps and rising sea levels, changes to weather and ecosystems, and threats to human health.

1. CAUSES & IMPACT ON
ENVIRONMENT

2. What is Green House?
 What is the pre-history of Green House?
 What is Green House Effect?
What is the causes of Green House effect?
 Selective Absorbers & the Green House Effect!
 What does a greenhouse gas do?
What happens when more and more greenhouse gases
go into the atmosphere?
 What happens when the Earth gets warmer?
Result of Green House effect!!!

3. A Greenhouse (also
called a Glasshouse) is
a building in which
plants are grown. These
structures range in size
from small sheds to very
large buildings. A
miniature greenhouse is
known as a cold frame.

8. The idea of growing plants in environmentally
controlled areas has existed since Roman times. The
Roman gardeners used artificial methods (similar
to the greenhouse system) of growing to have it
available for his table every day of the year.
Giant greenhouses in the Netherlands
But the first modern greenhouses were built
in Italy in the 13th century.

10. The Greenhouse effect is a process that is naturally
occurring on our planet. The reason it is a concern is many
scientists believe the process is being changed because of
our use of energy in the last 100 years or so. When this
energy hits the earth, the earth in turn reflects that energy
back toward the sun. But the earth has an atmosphere it is
surrounded by a shield of water vapor, carbon dioxide and
other so-called “Greenhouse gases." The main
greenhouse gas isWater vapor. The greenhouse gases also
function to reflect some of the sun's radiation away from
out planet, so it does not get too much energy from the sun.

12. Sun energy passes through
atmosphere
26% is reflected or
scattered
19% absorbed by clouds,
gases and particles
4% reflected to space by
Sun
51% reaches the
surface

14. Water is the most important/potent of greenhouse gas.
Water vapor is transparent to short wavelength radiation
and transmits solar radiation to the Earth's surface with
little attenuation. However, water absorbs longer
wavelength radiation (IR) from the Earth.
CO2 is not very abundant but it is a potent greenhouse gas that
we are able to increase in the atmosphere . By contrast, H2O is
already saturated and its amount in the atmosphere cannot be
increased.
Increasing CO2 content in the atmosphere by burning fossil
fuels is thought to result in global warming.
Global warming results in more atmospheric water thus
increasing the greenhouse effect — feedback

15. Deforestation
Burning of Fossils
Electrical Appliances
Population Growth

18. Greenhouse gas works like
a great space blanket that
keeps the heat in. So the
sun's rays heat up the
earth, and the greenhouse
gases stop the heat
reflecting back out to
space. So the earth
gradually gets warmer
GlobalWarming.

19. Most scientists agree that CO2 plays a role in
warming the Earth through the greenhouse effect.
However, the somewhat controversial hypothesis is
that increased (anthropogenic?) CO2 in the
atmosphere may enhance the warming of our
planet.

21. The figure shows that the
concentration of CO2 in the
atmosphere has been steadily
increasing since the mid-1700's. This
corresponds with the Industrial
Revolution and the increased use of
fossil fuels (especially coal).
These data were obtained from trapped
air bubbles in ice layers from Simple
Station (Antarctica)

23. A greenhouse gas (sometimes abbreviated GHG) is a
gas in an atmosphere that absorbs and emits radiation
within the thermal infrared range. This process is the
fundamental cause of the greenhouse effect.
Greenhouse gases greatly affect the temperature of
the Earth; without them, Earth's surface would be on
average about 33 °C (59 °F)colder than at present

25. The Ice at the north and
south poles will melt,
causing the sea levels to
rise. The increase in
temperature will affect the
weather. Eventually the
ozone layer "our
protection from the sun
will deteriorate, and we
will feel the true heat of
the sun‘s rays.

27.  Global warming
 Sea level rise
 Economic impact
 Agricultural impact
 Effects on aquatic systems
 Effects on hydrological cycles
 Health
 Direct effects of temperature rise
 Spread of disease