EARTH The earth is 4.5 billion years old. The Big Bang theory says that there was an explosion caused by the crash of matter which created our Solar System. Millions of years ago‚ during the Paleozoic era‚ the seven continents formed one single super-continent‚ from which they later detached driven by endogenous forces. Mankind appeared on Earth 30000 years ago. According to Darwin organisms which adapt the best to the environment they live in‚ survive the longest. Mankind become the dominant
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Environmental Threats Global Problems Sea Level Rising At present‚ sea levels around the world are rising. Current sea level rise potentially impacts human populations and the natural environment. Global average sea level rose at an average rate of around 1.7 ± 0.3 mm per year over 1950 to 2009 and at a satellite-measured average rate of about 3.3 ± 0.4 mm per year from 1993 to 2009‚[01] an increase on earlier estimates.[02] Climate change Destructive sudden heavy rains‚ intense tropical
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Set No - 1 Subject Code: R13106/R13 I B. Tech I Semester Regular Examinations Feb./Mar. - 2014 ENVIRONMENTAL STUDIES (Common to CE‚ ME‚ CSE‚ PCE‚ IT‚ Chem E‚ Aero E‚ AME‚ Min E‚ PE‚ Metal E) Max. Marks: 70 Question Paper Consists of Part-A and Part-B Answering the question in Part-A is Compulsory‚ Three Questions should be answered from Part-B ***** What are the causes of floods and droughts? What are ecological pyramids? Write about different types of pyramids Write about different values of
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Nowadays‚ many countries are facing serious pollution problems. These problems are caused by human activities and the areas that most affected are land‚ water‚ and air. However‚ there are some solutions that can help people and the environment. Land pollution is a major problem which is increasing day by day. In my opinion‚ the main problem on land is litter on the streets. Fortunately‚ there are a number of possible solutions which could lead to a permanent reduction in the waste. One way would
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General Education I-A Submitted to: Mrs. Josefa Deyto Professor Pollution is said to be one of those problems that our environment is facing right now‚ due to its harmful effects to everyone and also to our atmosphere. We have different kinds or types of pollution; we have pollution in land‚ in water and in air. We all know that these came from pollutants which were produced by human. Some of these are wood burning to produce
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The importance of environmental protection Environmental protection is an increasingly pressing issue all over the world. Ozone depletion‚ green house effect‚ global climate changes or global warming‚ etc‚ are the main issues in environment. Recent years‚ many countries and various organizations have paid more attention into environmental protection. A treaty about global environmental protection was discussed by 192 nations in Copenhagen in December 2011. But I fell every individual
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Air pollution is the introduction into the atmosphere of chemicals‚ particulates‚ or biological materials that cause discomfort‚ disease‚ or death to humans‚ damage other living organisms such as food crops‚ or damage the natural environment or built environment. The atmosphere is a complex dynamic natural gaseous system that is essential to support life on planet Earth. Stratospheric ozone depletion due to air pollution has long been recognized as a threat to human health as well as to the Earth’s ecosystems
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country indicate their pitch in decibel in the nosiest areas of corresponding cities‚ e.g. Delhi- 80 db‚ Kolkata - 87‚Bombay-85‚ Chennai-89 db etc. 3 Sources of Noise Pollution:- Noise pollution like other pollutants is also a by- product of industrialization‚ urbanizations and modern civilization. Broadly speaking ‚ the noise pollution has two sources‚ i.e. industrial and non- industrial. The industrial source includes the noise from various industries and big machines working at a very high speed
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“POVERTY AND POLLUTION” In the Article Poverty and Pollution‚ there are many things being discuss such as poverty‚ pollution‚ harmful gases‚ the percentage of infant mortality and how nearly 13‚000 suffer from respiratory disease. Many residents are suffering from different/variety of health problem as an result. These problems are very serious and dangerous. The people over in Brazil’s “valley of death” are having difficulties breathing and could die if there’s nothing done about the situation
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Did you know that most of the ocean pollution comes from us? This pollution can hurt the ocean animals and it will affect the food that we eat. Some of the most worst ocean pollution is untreated sewage dumped into the ocean‚ toxic chemical‚ and oil spills. The sewage gets into the ocean because of sewage pipes that break or leak. This is a problem because the sewage makes to much algae‚ and it will remove the oxygen. Around 80% of the sewage that is in the ocean is untreated. To help stop sewage
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