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Is population growth and a high global population causing unsustainable pressure on the earth

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Introduction

´╗┐Is population growth and a high global population causing unsustainable pressure on the earth The population has been growing continuously since the end of the Black Death, around the year 1400, although the most significant increase has been in the last 50 years, mainly due to medical advancements and increases in agricultural productivity. Although the rate of population growth has been declining since the 1980s, the United Nations has expressed concern on continued excessive population growth in sub-Saharan Africa. As of October 1, 2012 the world human population is estimated to be nearly 7billion by the United States Census Bureau, and over 7 billion by the United Nations. Most estimates for the carrying capacity of the Earth are between 4 billion and 16 billion. Depending on which estimate is used, human overpopulation may or may not have already occurred. Nevertheless, the rapid recent increase in human population is causing some concern. The population is expected to reach between 8 and 10.5 billion between the year 2040 and 2050. In May 2011, the United Nations increased the medium variant projections to 9.3 billion for 2050 and 10.1 billion for 2100. Population growth is causing unsustainable pressure on the earth because the resources the earth has can?t sustain the number of people that there are. For example 1 billion people are malnourished. ...read more.

Middle

The wildfires that hit the world last year were a result of land management, ignition sources and extreme local weather probably linked to climate change. Poor access to fresh water is expected to nearly double with population growth. Biodiversity losses, will be exacerbated by climate change. Beyond 2050, regional climate change could have huge consequences. The Earth has entered the Anthropocene Era in which humans are dominating environmental force according world overpopulation awareness (WOA.) Global environmental change challenges the political decision-making process and will have to be based on risks that events will happen, or scenarios will unfold. Global environmental change is often gradual until critical thresholds are passed. Some rapid changes such as the melting of the Greenland ice sheet would be irreversible in any meaningful timescale, while other changes may be unstoppable. We know that there are risks of rapid and irreversible changes to which it would be difficult to adapt. Incremental change will not prevent climate change, water depletion, deforestation or biodiversity loss. Breakthroughs in technologies and resource management that will affect economic sectors and lifestyles are required. However there are lots of reasons why it isn?t causing unsustainable pressure for example there is a theory that is ?Necessity is the mother of invention?. This means that population growth leads to civilisation. Growth did help because it meant that people created things like farming and irrigation (it means a way to grow crops by building ...read more.

Conclusion

Even though poverty can be caused by overpopulation it is the lack of education that is causing the mass deforestation of the rainforest not high population. Another reason why population is causing unsustainable pressure on the earth is because of CO2 emissions. However people are now using more and more renewable forms of energy such as solar power, geothermal and wind power. These are being used in a lot of homes and are producing a lot of power to supply countries. Also there is a lot of investment of time and money in the research of better more renewable ways. In fact there has been a huge increase of money invested into these projects. This links back to the point I made of ?Necessity is the mother of invention? as it shows that as we expand over the globe and threaten to destroy it with the greenhouse effect we are finding new ways to prevent this and to use more renewable resources. To conclude I think that high population and high population growth is causing unsustainable pressure on the earth. But that is at the moment because even though we may be consuming a lot of resources and many people are malnourished that is not to do with the amount of ?stuff? on the earth but more to do with the greediness of mankind. There for the size population is not causing unsustainable pressure on the earth. ...read more.

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