Global Warming, the problem, the potential impacts and alternatives to fossil fuels.

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Category 1 – Knowledge (10 points)

  1. Explain the term global warming.

Global Warming is a process of when the earth heats up and raises temperatures all over the world. Global Warming has many consequences that come with the issue. The definition of global warming is the raise in average temperatures which has happened throughout history. Scientists suggest that we have caused the problem and that we need to fix it so that it temperatures rise enough to affect our food chain. The current temperatures are already killing plants and animals and rising sea levels all over the world. Global warming has been a natural process throughout history but now it is said to be caused by excessive use of fossil fuels and deforestation.

The image shows how the infrared radiation penetrating through to the earth there fore heating it up, some is blocked by clouds. The radiation is bouncing back into space and hitting the greenhouse gases therefore trapping the heat and making the earth warmer.

  1. What will cause sea levels to rise?

As world temperatures rise so do the sea levels, rising sea levels can cause a great deal of problems. Global warming is a major factor in sea levels increasing; this is because of the melting of polar ice caps. The polar ice caps contain 2.4% of the world’s surface water; if this all melts the consequences are tremendous. The consequences of the polar ice caps melting including; mass population evacuation, the inundation of water in low lying areas and will affect the food quality and sustainability. With temperatures around the world rising because of global warming the average sea temperatures rise of increasing infrared radiation melting the ice in Antarctic and Polar regions. Every year parts of Greenland’s ice shelf is melting, the rising water carries out to sea and every year the melting of this ice shelf increases which releases more water into the sea. In Antarctica the surface ice has enough water to rise sea levels over 60 metres. Every year the temperature of the ice in is increasing which indicates rapid increase in sea levels.

Category 2 – Showing your understanding (10 points)

  1. Explain the impacts of increasing ocean levels.

With rising sea levels comes consequences, the consequences can be felt throughout the land as it does affect life on earth. The consequences of rising sea levels include; food production, mass population displacement, flooding, permanent land submersion and coastal erosion. Food Production will be effected because of the increase of salt in water and soil due to sea water submerging land. With high winds on a beach, the salt in the sea water will blow onto crops limiting their growth size and time. With rising sea levels the displacement of many islands and cities will be very common. Only half a metre is necessary to submerge islands in the Pacific, some of the islands in the Pacific Ocean have asked neighbouring countries for a migration to their country because of the fear their island will be under water. Rising sea levels could displace over 70000000 people around the world. Flooding is a major issue all around the world, flooding occurs when a build up of water occurs on land. Many low lying cities will be hardest hit and may even be permanently under water. Permanent land submersion is a very realistic problem, many islands will be submerged and for those people living on those islands they will need to relocate and establish new lives. Coastal erosion will effect us here on the Gold Coast, beaches will be closer to homes and business as sea levels rise, beaches will erode in to the sea and our homes will be soon covered with water. The effects of a sea level change can be felt everywhere in the world and effects all of our lives.

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  1. Explain the alternatives to fossil fuels for energy production.

There are many alternatives to fossil fuels in our day and world. Alternatives include; Wind, Geothermal, Ocean/Wave, Solar, Hydroelectric and there are many more. For our cars and transportation we can use ethanol and green electricity from green sources. These alternative energy sources are called Green Energy. Green energy is what many politicians, scientists and researchers is the key in reducing emissions and therefore pollution and temperatures. Many green energy concepts have been thought up as they are sustainable for the future. Wind Energy is set up by ...

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