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Human Impact on the environment

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Introduction

Human Impact on the Environment Both graphs show a positive correlation which means there is a strong relationship between the rises in global temperature to the level of carbon dioxide in the air. It shows from the year 1800 - 2000 the air temperature has increased from -0.1�c to 7�c. This is an important change for the earth's average temperature, although it does not seem like much. The graph is varied where by between the years 1940 to 1980, it decreases and then increases, but the main trend it is that the global temperature is increasing. The second graph, which shows the rise in carbon dioxide, definitely confirms that there is a link between air temperature and carbon dioxide levels in the air. Because the rise in carbon dioxide, creates a greenhouse effect which forms an external layer around the earth, this prevents any of the earths heat to escape, the more this layer thickens the more it will be a disadvantage to the environment. From the year 1880 to 2000, there has been an increase of carbon dioxide in the atmosphere. As you can see on the bar chart above, there has been a major decrease of the thickness of ice in different parts of the arctic sea and in some parts; it has almost reduced half its original size. For example in Canada Basin the thickness of the ice was 3.5 between the years 1958 - 1976 and reduced to 2.1 between the years 1993- 1997. ...read more.

Middle

In 1997, in Japan, the UN conference was held, where they stated that they would cut down the amount of gases the industries create, which will reduce the amount of carbon dioxide released. The British government in 2003, started on their plan in order to produce electricity by 'greener' ways. Countries are trying to reduce the amount of gas which is entering our atmosphere and people can also do the same by: starting to recycle more, which will then prevent the combusting of landfill and other health risks and the recyclable products are collected by the council weekly. They could also re-use plastic bags as plastic is not recyclable, produce compost heap rather than dumping it; CYCLE to places or use public transport instead of driving a car; have showers instead of baths as more water is taken out from having a bath than shower. There are other ways in which we could produce energy rather than to burn fossil fuels. These alternatives are known as renewable energy such as wind, wave, water and biofuels. These energy resources all have advantages and disadvantages. Wind The wind energy is used to make electricity; this will be an advantage to us, as we use electricity everyday. Wind is caused by the uneven heating of the earths land by the sun. Wind turbines produce enough energy to provide for 350 households. ...read more.

Conclusion

As you know diesel is the liquid put into the car for it to accelerate, bio diesel is the same thing, however, not been made of petroleum and has been made from animal oils and fats (lipids). Biofuels are usually made of ethanol or even cooking oil. Burning the fuels releases carbon dioxide but growing the plants absorbs a comparable amount of the gas from the atmosphere. A recent UK government publication declared that biofuels reduced emissions "by 50-60% compared to fossil fuels. A disadvantage of biofuels is biodiversity, as biofuels will reduce the habitats of animals and wild plants. In addition, if plants such as soy or corn are used then the price will rise which will affect the food suppliers. There is also solid biomass, which includes wood, sawdust, grass cuttings, domestic refuse, charcoal, agricultural waste, non-food energy crops and dried manure. Wood is used to power cars as well as the heating in our homes, which provides heat, or raise steam. The advantage of this is that it will decrease the amount of carbon dioxide in the air by a massive amount; this is shown on the graph above that shows global concentration of carbon dioxide. The graphs and charts plotted above have been obtained from the organisation based on the BBC (British Broadcast Corporation) e.g. Hadley Centre, UNEP. These are credible and reputable organisations, which specialises in supplying statistics. It has the best computing resources and top researchers, which means that the information I have received is reliable. ?? ?? ?? ?? Additional Science Human Impact on the Environment ...read more.

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A rather superficial look at energy consumption and global warming.

Marked by teacher Adam Roberts 16/07/2013

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