Presentation on theme: "THE HOLE IN THE OZONE LAYER"— Presentation transcript:
1THE HOLE IN THE OZONE LAYER GLOBAL WARMINGANDTHE HOLE IN THE OZONE LAYERYes they are 2 different things……!
2GLOBAL WARMING IS ALSO KNOWN AS THE GREENHOUSE EFFECT
3GLOBAL WARMING IS ALSO CALLED: THE GREENHOUSE EFFECT!So what is a greenhouse? How does it work? What has this got to do with global warming then??
4So what is the Green house Effect? Our earth is surrounded by a layer of gases called greenhouse gases which are naturally occurring (in other words they are meant to be there and would be there whether humans were on the planet or not!) There job is to keep the planet at a nice warm temperature - in fact without them there would be no little life on our planet as the temperature would be 33 c colder and far too cold for plants and animals to survive. The main gases that make us this layer are carbon dioxide, methane, CFC and nitrous oxide. This layer of gas acts like the roof of a greenhouse and that is why it is called the greenhouse effect. They allow the suns heat to pass through easily and warm the planet but they do not allow much to escape back into space thus keeping us all warm and able to survive.
5REMEMER....The greenhouse effect is NATURAL! It is supposed to happen! It would happen even if there was not a human being on the planet! In fact if there was no greenhouse effect then humans could not live here as the planet would be 33c colder and would look like and be as cold as Mars!
6So it's us that turns the GREENHOUSE EFFECT into GLOBAL WARMING!!! But HOW!?!?!
7Think about the greenhouse as if it was the planet and this is…. GLOBAL WARMING
8So what is GLOBAL WARMING then? Unfortunately human activity is adding more gas to the layer than there should be. It is therefore getting thicker and thicker. It is still able to let the sun’s heat through but even less heat is escaping back into the atmosphere. This means that the earth’s temperature is rising.
9Human activity is adding more gases to the naturally occurring layer of greenhouse gases. This thickens it so it cannot let as much heat return to space and so the temperature of the earth gradually increases……GLOBAL WARMING!What are greenhouse gases?Name of gasContributionSource(s)Carbon dioxide (CO2)50%From burning coal and oil, and the removal of vegetationChlorofluorocarbons (CFCs)20%From air conditioners, refrigerators and aerosolsMethane (CH4)16%From rice growing, animal waste, swamps and landfillsOzone (O3)8%From air pollutionNitrous oxide (N2O)6%From fertilizers and burning of coal and oil
10CARBON DIOXIDE As you can see the main culprit is Spend 5 minutes in 2’s listing all the ways that you have contributed to global warming in the last 24 hours!
11Just think for a moment about how much electricity we all use…..! So where are these gases coming from?Power stations release huge amounts of carbon dioxide as they burn coal (a fossil fuel) in order to produce electricity.Just think for a moment about how much electricity we all use…..!
14China and India are particular bad contributors to global warming. It’s many LEDC’sThey are currently experiencing their industrial revolution and are becoming the greatest users and producers of electricity and are burning huge quantities of fossil fuels to keep their booming industries going. This is creating masses of pollution and contributing greatly to global warming.China and India are particular bad contributors to global warming.
156 of the 10 most polluted cities in the world are in China! China is currently the world's second largestenergy consumer and producer and will overtake the USA by 20096 of the 10 most polluted cities in the world are in China!Picture above: Beijing's smogLanzhouThis country is hooked on coal. With 21,000 coal mines across the country, it is cheaper and more easily available than any other form of energy in China. It is the lifeblood of its booming economy, producing 70 per cent of the energy that fuels its dramatic growth.
16Engines burn oil which is another fossil fuel Engines burn oil which is another fossil fuel. They also add carbon back into the atmosphere and thicken the layer. Just think a moment about how many vehicles there are around……
17Brilliant we will be able to sunbathe here in the UK!! Global Warming….So what......?!It was found that 9 hottest years on record occurred during the past 14 years. The mean Earth temperature in 1997 was 0.43°C higher than the past 26 years.Brilliant we will be able to sunbathe here in the UK!!
19ICE CAPS MELTING AND SEA LEVEL RISE But what are the real consequences of global warming for us all?ICE CAPS MELTING AND SEA LEVEL RISE
20Global warming causes the polar ice sheets melt Global warming causes the polar ice sheets melt. It increases the sea-level. It will possibly rise 18 cm by 2030 and 58 cm by Flooding will probably occur in lowlands. Many cities along the coast may be under sea water.
21The loss of polar ice will have a profound effect on nature in particular animal habitats.
227 METRE RISE13 METRE RISE84 METRE RISESea level rise around the world is going to leave many people homeless!
23Many of the world’s islands are already disappearing beneath the sea. The tiny island nation of the Maldives is in trouble. If global warming continues, say scientists, the country could sink beneath the ocean within 100 years. The average height of the islands above sea level is 1.5 metres and the rate of sea level rise is currently 59cm per century.
24Tuvalu is found in the ocean near Australia Tuvalu is found in the ocean near Australia. Most of Tuvalu is less than one metre above seal level.
25A Tuvalu Poem TUVALU AND GLOBAL WARMING Jane Resture I hear the waves on our island shore They sound much louder than they did before A rising swell flecked with foam Threatens the existence of our island home. A strong wind blows in from a distant place The palm trees bend like never before Our crops are lost to the rising sea And water covers our humble floor. Our people are leaving for a distant shore And soon Tuvalu may be no more Holding on to the things they know are true Tuvalu my Tuvalu, I cry for you. And as our people are forced to roam To another land to call their home And as you go to that place so new Take a little piece of Tuvalu with you. Tuvalu culture is rare and unique And holds a message we all should seek Hold our culture way up high And our beloved Tuvalu will never die
26There will also be an increase in COASTAL FLOODING
27And Hurricanes will become more frequent, intense and will happen in places that currently do not suffer them!
33Or use energy saving light bulbs….. Which will also save you money!
34Which is just as well as your fuel bills will start to get more and more expensive. This is one of the ways that the Government are tryint to combat Global Warming – by trying to encourage us to use less electricity.
35Or try and generate electricity in a cleaner, more environmentally friendly way?
36We can also think about the way we travel! From these……