GLOBAL WARMING GROUP NAME: 1) NUR HARYATI BINTI KAMARUDIN 2) NURUL KHAIRIN NISA’ BINTI ANDDRYE

Global warming is the rise in temperature of the Earth's atmosphere. The earth is naturally warmed by rays from the sun which pass through the atmosphere and are reflected back out to space again. The atmosphere's made up of layers of gases - some of which are called greenhouse gases. They're mostly natural and make up a kind of thermal blanket over the Earth.

This lets some of the rays back out of the atmosphere, keeping the earth at the right temperature for animals, plants and humans to survive (60°F/16°C). So some think global warming is good. But most scientists think if extra greenhouse gases are made, the thermal blanket gets thicker and too much heat is kept in the earth's atmosphere - that's when global warming's bad.

 Greenhouse gases are made out of:  water vapour  carbon dioxide  methane  nitrous oxide  ozone  chlorofluorocarbons (CFCs)

 How are extra greenhouse gases made?  Although plants absorb carbon as they grow, extra carbon is released into the atmosphere when humans cut down trees.  Extra greenhouse gases are produced through activities which release carbon dioxide, methane, nitrous oxide and ozone CFCs (chlorofluorocarbons).  These activities include:  Burning coal and petrol, known as 'fossil fuels'  Cutting down of rainforests and other forests  Animal waste which lets off methane

AAs we live our lives, we use resources to heat and light our homes, travel and even to produce our food. WWhen power stations create that power for us to use, they produce gases as waste. One of them is called carbon dioxide, and a number of experts are convinced it plays a big part in climate change. RReducing the amount of carbon dioxide people - and countries - around the world use up is seen as a key way to reduce climate change. IIt's called a carbon footprint, and the more a person produces, the larger their carbon footprint.

 Someone who goes on lots of plane journeys or drives a car everywhere would have a much bigger footprint than someone who doesn't.  That's because planes and other vehicles also produce carbon dioxide.  That means that if you eat food from your back garden your footprint won't get much bigger.  Similarly, if you get a bus to school, that's better than being driven on your own, because the gases the bus gives off when driving are spread across lots of people.

Some things that make a small carbon footprint  Walk/Cycle to school  Read books for fun  Eat food grown in the garden Some things that make a big carbon footprint  Driven to school  Play games console/watch TV for fun  Fly away to far-off countries on holiday

What Causes Global Warming?

If the Earth gets hotter, these are some of the things that could happen:  Water expands when it's heated so sea levels could rise.  Animals like polar bears - which live on the ice - might die out.  There could be more floods, especially near the coast and rivers

 Lakes and rivers could dry up.  Less water would be available.  Some plants and animals might become extinct because they cannot cope with higher temperatures.  Hurricanes, tornadoes and other storms which are caused by changes in heat and water evaporation.

 There are ways you can help cut greenhouse gases and help stop global warming. # Recycle glass bottles, jars, newspapers and magazines and tin cans. Save them and take them to local recycling centres. # Persuade your mum or dad (or whoever does the gardening) to have a compost heap. # Put a brick in a plastic bag into your toilet cistern, then the toilet will use less water each time you flush. # Only fill the kettle up with the amount of water you need to boil that time. # If you get lift to school in a car, take your mates along for the ride. # Ask whoever does your washing to use the machine at 40 degrees - this helps conserve power.

What can I do ? ?

Evidence about green house effect

Report by: James Shaw

Various circle of global warming

TORNADO

FLOOD