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Assay o3 - Essay Example

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The emission of carbon dioxide into the atmosphere are both by natural, and man-made. Natural source of CO2 emissions include volcanic activity and combustion of organic matter etc, While man-made source of emission are burning of fossil fuel such as coal, and petroleum…
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Download file to see previous pages The upper safety limit for the atmospheric CO2 is 350ppm (parts per million) and it has stayed higher than 350ppm since 1998. The 2010 average annual concentration of CO2 in the atmosphere is 389.78ppm. The 2009 average was 387.35ppm registering an increase of 2.43ppm per year. On the effect of global warming, May 2011 is the 10th warmest May on record since 1880. The impact of climate changes and global warming because of rise in CO2 level in atmosphere has adverse effect on weather food supply, food security, rise in sea level global economy and human health. The amount of CO2 level in the atmosphere is already above the threshold that can potentially cause dangerous climate changes, The CO2 emissions have grown sharply since 2000. Climate disasters are on the rise. Around 70 percent of disasters are now climate related- from around 50 percent from two decades ago. In the last decade 2.4 billion people were affected by climate related disasters, compared to 1.7 billion in the previous decade. More extreme weather is already occurring in our world and the number of people affected and the damages inflicted by extreme weather has been unprecedented. The incidence of cyclones and rainfall associated with such weather has increased by 7percent. Destructive sudden heavy rains, intense tropical storms, cyclones repented flooding and droughts are likely to increase as will be vulnerability of local communities. Hurricane Katrina Cyclone Nargis and Tsunami which occurred during 2004 are likely to happen next twenty years. Consequent on of global warming, higher evaporation and high surface temperature will cause more rainfall causing soil erosion and desertification of areas. Higher surface temperature decreases the length of rivers. The drying of river and streams and droughts will severely reduce the availability rain water. The African countries and parts of South Asia are already devastated by floods and drought. Drought hit areas will face famine and falling food production. Many people in the region of African and South Asia are already experiencing food crisis. The available crop land per capita is radically diminishing and food production is also coming down. Global warming has accelerated the ice loss in polar region and will soon cause rise in sea level. Scientists are calculating that polar ice sheets are losing enough ice to raise the levels. Overall sea level in the world are rising 3mm per year. If the increases in ice – or melting of ice persists water from two polar ice sheets could have added 15cm to the average global sea level will by 2050. If this continues, the rise in level will have catastrophic effects on island nations and countries with long and low coastal lines. Human health will suffer as a result of climate change. The 2003 Europeans heat wave killed 30,000 people, Some infectious vector borne diseases will spread malaria and other epidemic diseases.Loss of forest cover in the developed countries will have a tell tale effect on bio diversity and deforestation speeds up concentration CO2 in this already higher level in the atmosphere . Global warming and rising CO2 concentration could promote many agricultural weeds lowering crop yields and demanding more pesticides. In a particular year with usually high rainfall, the weed cheat grass spread reducing the diversity of plant species modified the food chain and increased the risk of wild fire. The elevated CO2 level can enhance the yields of crop such has ...Download file to see next pagesRead More
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