Making communications land - Are they received and understood as intended? we...
Climate change by prabhunath sharma
1.
2. Climate change is a broader term
that refers to long-term changes in
climate, including average
temperature and precipitation.
In the atmosphere, “greenhouse”
gases trap some of this heat, and
the rest escapes into space. The
more greenhouse gases are in the
atmosphere, the more heat gets
trapped.
3. Global warming is the increase of the
Earth’s average surface temperature due
to a build-up of greenhouse gases in the
atmosphere.
4. GREENHOUSE EFFECT
• The “greenhouse effect” is the warming that happens when certain
gases in Earth’s atmosphere trap heat. These gases let in light but
keep heat from escaping, like the glass walls of a greenhouse.
Methane
Nitrous oxide
Carbon dioxide
Sulfur
Water hexafluoride
5. The gas responsible for the most warming is carbon dioxide, also
called CO2 . Different greenhouse gases have very different heat-
trapping abilities. Some of them can even trap more heat than CO2.
A molecule of methane produces more than 20 times the warming
of a molecule of CO2. Nitrous oxide is 300 times more powerful
than CO2. Other gases, such as chlorofluorocarbons, have heat-
trapping potential thousands of times greater than CO2. But
because their concentrations are much lower than CO2, none of
these gases adds as much warmth to the atmosphere as CO2 does.
6. The planet is warming, from North Pole to South Pole, and everywhere
in between. Globally, the mercury is already up more than 1 degree
Fahrenheit (0.8 degree Celsius), and even more in sensitive Polar
Regions. And the effects of rising temperatures aren’t waiting for
some far-flung future. They’re happening right now. Signs are
appearing all over, and some of them are surprising. The heat is not
only melting glaciers and sea ice; it’s also shifting precipitation
patterns and setting animals on the move.
Sea levels are expected to rise between 7 and 23 inches (18 and 59
centimeters) by the end of the century, and continued melting at the
poles could add between 4 and 8 inches (10 to 20 centimeters).
7. 1. Reduce your use of fossil fuels
2. Protect native forests as "carbon
storehouses"
3. Help plant native trees in urban and
deforested areas
8. WHAT IS AIR POLLUTION?
Air pollution is the introduction
of chemicals, particulate matter, or biological
materials that cause harm or discomfort to humans
or other living organisms, or cause damage to
the natural environment or built environment, into
the atmosphere.
12. Reuse
Reduce &
Recycle
The only way of Reducing
Pollution
13. 1. Absorbs over a ton of harmful greenhouse gases over
its lifetime.
2. Produces enough oxygen for four people every day
(Tree Canada Foundation)
3. Provides the equivalent cooling effect of ten room-size
air conditioners operating 20 hours a day.
4. Provides an estimated $273 of environmental benefits
in every year of its life.
14. • Warming of the climate system is completely clear.
• Human-caused warming over last 30 years has likely had
a visible influence on many physical and biological systems
.
• Continued GHG emissions at or above current rates would
cause further warming and induce many changes in the
global climate system during the 21st century that would
very likely be larger than those observed during the 21h
century.”
