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Introduction to Global warming

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Negin Oghabi

on 10 January 2013

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Transcript of Introduction to Global warming

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli By Negin Oghabi Introduction to
Global Warming What is 'Global Warming'? Many people have different interpretations of global warming. Some say that it is a situation that can easily be overcome. Some are really passionate about it and want it to end as soon as possible. However, some think that it doesn't exist.
Firstly, Global warming is one of the most significant issues of our generation. Furthermore, this issue is so extreme, that we can say it's the greatest threat mankind has ever faced. Global warming is the elevation of the temperature in the earth's atmosphere. Hence, as the earth gets warmer, sea levels begin to rise. Consequently, climate change is started. We are in the age in which the climate of the earth is beginning to get worse and worse.
That aspect, results into a vast number of effects. Some of the major ones are: political, economical, medical, cultural, environmental and technological. These effects are mostly negative; however, some positive impacts can be found. How is Global Warming caused? Does everyone believe in global warming? Despite all these calculations and research regarding global warming, there are still a minute amount of people across the world that don't belive in it. To support their perspective, they have come up with a few statements as pieces of evidence. They consist of:

Those statements were actual quotes of people. Although, some of the people don't have any evidence to support their point of view; some don't want to believe in it, as they find it too sad or even terrifying!
There are many other statements like these ones. However, the majority of them are wrong; like the first quote talking about the political parties. These arguements aren't that strong to establish the fact that global warming doesn't exist. What will happen, if the temperatures rise too much? Over the past 650 thousand years, we have been continuously producing carbon dioxide emissions, which added on into the earth's atmosphere, providing the suitable climatic conditions, which caused the development of the human race and civilisations. On the other hand, the carbon dioxide levels are rapidly elavating, and by the past 200 years, they have increased by one-third! Therefore, with more greenhouse gases being sent into the atmosphere, the temperatures will rise.
This hot world that we might live in, in the future, will bring with it hellacious consequences- ice caps will melt, causing sea levels to rise, flooding cities. This destroys agricultural production (farms and such); destructive storms will occur more often. As a result of this, there will be refugees migrating from the environmental conditions of their country, to another; thus, governments will see this as conflict and war.
The earth may be able to survive in these circumstances. However, we will not be able to survive. It's possible to say that these conditions are too extreme and doesn't meet our 'living criteria'.
Hence, we should try to do everything in our control to stop this heinous natural disaster from happening. What could we do to stop global warming? You can probably see how awful global warming and climate change is. So, people are doing their best to stop this disaster from happening. They are...
producing things that are are free of carbon footprint (less carbon emissions) ;
re-use, reduce, recycle ;
driving less or using public transport ;
using compact fluorescent light bulbs (energy saving lights) etc.
You can also be part of the countless people, fighting against global warming.
So the next time you leave a room and the light is on, remember these things about global warming, and turn the light off to be energy efficient.
You can even try walking to school or using public transport; instead of using the car.
There are a vast number of things you can do to prevent global warming, and save us, the other animals and the world from facing the worst threat ever. To acknowledge the causes of Global warming easier, we could split it into two different groups:
1 Natural causes
2 Anthropogenic causes
The natural causes are the causes created by nature. They appear to be less damaging than the physical causes.
The anthropogenic causes are the man-made causes. Therefore, this category signifies that we are the ones compelling the issue. Furthermore, the man-made causes are more harmful than the natural causes. Greenhouse gases In order to know more about the natural and physical causes of global warming and climate change, it's important to know it's overall effect- greenhouse gases. It's a gas that traps heat in the earth's atmosphere. The most important of greenhouse gases is Carbon dioxide (CO ).
Firstly, when the suns rays (solar rays) are being sent to the earth; some of them don't reach the Earth, but the remaining start heating up the planet. Meanwhile, the Earth it's self is emitting heat rays called infrared rays. As the infrared waves are being sent out, the greenhouse gases absorb them and send them back to the Earth; thus the Earth warms up, having both solar and infrared rays being sent to it. In other words, these gases are insulators. Without greenhouse gases, our planet would be as cold as Mars!
On the other hand, the negative side to this is that we are constantly thickening this blanket of insulating gas in the atmosphere; both humans and nature. . 2 Natural Causes As previously mentioned, the natural causes were causes that were triggered by nature. There are fewer and more minor natural causes than the anthropogenic ones. Some of them consist of:
Volcanic eruptions: when the volcanic eruptions with a high magnitude take place, overwhelming amounts of ash and toxic gases are sent out. Some of these gases are greenhouse gases. This then adds onto the gases in the earth's atmosphere.
The Arctic Tundra: The Arctic methane release is a process in which the gas 'methane' escapes. There are natural gas deposits, such as soils in permafrost(a layer of soil that's frozen throughout a year), that can release this greenhouse gas. Here is an image to help you understand the greenhouse gas effect A large volcanic eruption(ash clouds and greenhouse gases) Anthropogenic causes Anthropogenic or 'man-made' causes, are much more severe than the natural causes. This is because us humans release greenhouse gases more frequently than nature. We release greenhouse gases in vast number of ways; and most of these ways are from burning 'fossil-fuels' to produce energy. You may have heard the term 'fossil-fuels' before. They are natural supplies (fuels) such as coal and oil, formed by the decayed remains of organisms (fossils). We burn these materials, to produce heat or energy. Therefore, by burning fossil-fuels, we release greenhouse gases, that add to the atmosphere.
We burn fossil-fuels in...cars, factories, buildings, power stations... Isn't it possible to say that the list goes on forever?! However, something else that partially doesn't require burning fossil-fuels is cutting down trees(and sometimes burning them). Firstly, we humans are cutting down trees every where- especially in rainforests. It's called deforestation. It's essential to know that trees are stores of carbon- they help the world to fight against global warming. For example, in just one hectare(10'000 sq. metres) of the rainforests, you can find 100-300 tonnes of carbon! But that's just above the ground! Down below, the roots can hold over 40 tonnes. These are nothing in comparison to the soil; for the soil can hold up to 1'450 tonnes of carbon per hectare. Annually, rainforests absorb up to 10% of man's carbon emissions! These trees are really useful! Pie chart to show the anthropogenic causes of global warming As you can see, energy supply has the highest percentage in the chart- hence, we release greenhouse gases most by the supply of energy. Forestry has the third highest percentage, which makes it one of the most common ways that we release greenhouse gases. Natural cause Global warming is just an issue that was brought up in political debates. No one ever had the idea of 'climate change' until a few members in a political party started talking about it. Then, everyone was influenced by their thought, and done inaccurate research on it.
Now the whole world is making a
great deal out of it. Scientists say that there will be an ice age soon. We have no control on global warming, and it's nothing bad. It's just nature repeating a special cycle throughout many years- it's a natural occurance. There is nothing to worry about global warming.
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