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hanna marin

on 29 July 2014

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Transcript of GLOBAL

Here Is An Introduction To Global Warming
Why is global warming a problem for the environment?
Global warming has many effects on the environment. Here are some and the problems they can cause:
How has global warming occurred ?
Why is global warming a problem to the environment ?
Who, in particular, is affected by global warming ?
What was/can be done to prevent global warming ?

What Can Be Done To Prevent Global Warming ??
1-Reduce Fossil Fuel Use
3) Reduce Waste
Conserve Water
There are may ways to reduce fosill fuel use some are :
1) use less energy
Fossil fuel is coal, oil and natural gas, all being used in travel, industry, and to generate electricity, and all adding carbon dioxide into the atmosphere.
2) Use alternative and renewable sources of energy such as solar wind and geothermal.
3) use less cars and more public transport .
if using cars then use hybrid or electric cars
2) Plant More Trees
Because carbon dioxide is the most important greenhouse gas, planting trees and other plants can slow or stop global warming. Plants take in carbon dioxide and release oxygen.
The production of garbage contributes to global warming both directly and indirectly. Decomposing waste in landfills produces methane and other greenhouse gases. Waste also requires energy to manufacture in the first place.
Use more energy efficient products
Cities consume significant amounts of energy when purifying, distributing and heating water, which contributes to greenhouse gas emissions. Saving water reduces the amount of energy used.
You Can Conseve Water By :
At home, turn off water immediately whenever you're not using it

In your garden, landscape with plants and grasses that require less water
Repair or replace leaky faucets and toilet as soon as possible
Capture rainwater then reuse to water plants or other jobs that require water
And Finally .....

Ice is melting worldwide, especially at the Earth’s poles. This includes mountain glaciers, ice sheets covering West Antarctica and Greenland, and Arctic sea ice.
Sea level rise has increased and become a lot faster over the past century
Researcher Bill Fraser has tracked the decline of the Adélie penguins in Antarctica, where their numbers have fallen from 32,000 breeding pairs to 11,000 in 30 years.
Many animals habitats are destroyed and they are forced to move somewhere where they can survive. Many are left stranded on icebergs and pieces of ice floating in the sea.
On average, precipitation has increased across the globe
Spruce bark beetles have increased rapidly in Alaska thanks to 20 years of warm summers. The insects have chewed up 4 million acres of spruce trees.
These events are expected if warming continues:

Sea levels are expected to rise between 18 and 59 centimeters by the end of the century, and continued melting at the poles could add between 10 to 20 centimeters.
Who In Particular Is Affected By Global Warming?
Two Particular types are affected, which are.......
Florida's average temperature has increased 2 degrees Fahrenheit, and the yearly number of above-90-degree days is expected to almost triple by the end of the century (to about 165 days).
Rise in the number of insects, and their appetites meaning less plants and more diseases such as dengue fever
Florida will get wetter aswell as hotter
Soon costal areas will be underwater and many key tourist islands will be totally submerged
Coral reef that is already being injured by increasing water temperature, which bleaches the reef of color
In UK winters would be shorter, spring and summer longer and autumn less cold and rainy.
There could be a decrease in tree diversity, including the loss of maple, spruce and fir species.
20% to 30% of plant and animal species around the world may be at increased risk of extinction because global temperatures continue to rise more than 2 to 3 degrees Celsius above average.
Scientists have noted changes in birds' migratory patterns
Causing drought in some regions and causing severe storms in others.
To summarise and think about more impacts and ideas -
In this presentation we will talk about.......
For watching our prezi !
By Anum Choudry & Khushi Sakhi !!
By Khushi and Anum
Ecosystems will change - some species will move further north or become more successful whilst others won’t be able to move and could become extinct. Polar bear biologist Ian Stirling fears that if sea ice disappears, the polar bears will as well.
Hurricanes and other storms are likely to become stronger.
Floods and droughts will become more common.
Species that depend on one another may become out of sync. For example, plants could bloom earlier than their pollinating insects become active.
If the Quelccaya ice cap in Peru continues to melt at its current rate, it will be gone by 2100, leaving thousands of people who rely on it for drinking water and electricity without a source of either.
Less fresh water will be available.
Some of the activities of man also produce greenhouse gases:

Burning fossil fuels - coal, oil and natural gas - releases carbon dioxide into the atmosphere. Cutting down and burning trees also produces a lot of carbon dioxide.

A group of greenhouse gases called the chlorofluorocarbons, - which are usually called CFCs - have been used in aerosols, such as hairspray cans, fridges and in making foam plastics. They are found in small amounts in the atmosphere. They are dangerous greenhouse gases because small amounts can trap large amounts of heat.
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