50 punkti
Autor soovib selle materjali allalaadimise eest saada 50 punkti.
~ 2 lehte
Lehekülgede arv dokumendis
2009-02-04
Kuupäev, millal dokument üles laeti
78 laadimist
Kokku alla laetud
0 arvamust
Teiste kasutajate poolt lisatud kommentaarid
rass93
Õppematerjali autor
Scientists first discovered acid rain in 1852, when the English chemist Robert Agnus invented the term. From then until now, acid rain has been an issue of intense debate among scientists and policy makers. Acid rain, one of the most important environmental problems of all, cannot be seen. The invisible gases that cause acid rain usually come from automobiles or coal-burning power plants. Acid rain moves easily, affecting locations far beyond those that let out the pollution. As a result, this global pollution issue causes great debates between countries that fight over polluting each other's environments. For years, science studied the true causes of acid rain. Some scientists concluded that human production was primarily responsible, while others cited natural causes as well. Recently, more intensive research has been done so that countries have the information they need to prevent acid rain and its dangerous effects. The levels of acid rain vary from region to region
Industry and motor vehicle exhaust are the number one pollutants. Heavy metals, nitrates and plastic are toxins responsible for pollution. While water pollution is caused by oil spill, acid rain, urban runoff; air pollution is caused by various gases and toxins released by industries and factories and burning of fossil fuels; soil pollution is majorly caused by industrial waste that deprives soil from essential nutrients. FIND OUT 5 WAYS HOW TO STOP POLLUTION. 2. Global Warming: Climate changes like global warming is the result of human practices like emission of Greenhouse gases. Global warming leads to rising temperatures of the oceans and the earth surface causing melting of polar ice caps, rise in sea levels and also flash floods, excessive snow or desertification. FIND OUT 5 WAYS HOW TO STOP GLOBAL WARMING. 3. Overpopulation: The population of the planet is reaching unsustainable levels as it faces shortage of resources like water, fuel and food
SISUKORD ENERGY STORY................................................................................................................4 USES OF ENERGY............................................................................................................. 4 2.1 Uses of energy in homes...............................................................................................5 2.2 Types of energy used in homes.................................................................................... 6 2.3 Energy use in different types of homes........................................................................ 6 2.4 Commercial Energy Use...............................................................................................9 2.5 Industrial and Manufacturing Energy Use..................................................................11 2.6 Transportation Energy Use.........................................................................................12 RENE
GLOBAL WARMING Global warming is the observed century-scale rise in the average temperature of Earth's climate system. Since 1971, 90% of the increased energy has been stored in the oceans, mostly in the 0 to 700m region. Despite the oceans' dominant role in energy storage, the term "global warming" is also used to refer to increases in average temperature of the air and sea at Earth's surface. Since the early 20th century, the global air and sea surface temperature has increased about 0.8 °C (1.4 °F), with about two-thirds of the increase occurring since 1980.Each of the last three decades has been successively warmer at the Earth's surface than any preceding decade since 1850. More than 90% certain that most of global warming was being caused by increasing concentrations of greenhouse gases produced by human activities.In 2010 that finding
WE are here and are ready to participate in educational projects designed to lead the USA in the first countries in the world. European educational system with its broad coverage of humanities, collective work, discipline, obligatory level of knowledge for an educated person can contribute to the American system of education. This new system of education can be a model for other countries to follow. It would be easier to live and understand each other in this shrinking world, in this global community. What Is Education For? Six myths about the foundations of modern education, and six new principles to replace them by David Orr One of the articles in The Learning Revolution (IC#27) Winter 1991, Page 52 Copyright (c)1991, 1996 by Context Institute We are accustomed to thinking of learning as good in and of itself. But as environmental educator David Orr reminds us, our education up till now has in some ways created a monster. This essay is
..........................................16 3. Conclusion............................................................................................................ ....18 4. Sources............................................................................................................... .......19 Renewable energy Renewable energy is energy generated from natural resources--such as , wind, rain, tides and geothermal heat--which are renewable (naturally replenished). In 2006, about 18% of global final energy consumption came from renewables, with 13% coming from traditional biomass, such as wood-burning. Hydroelectricity was the next largest renewable source, providing 3% (15% of global electricity generation),followed by solar hot water/heating, which contributed 1.3%. Modern technologies, such as geothermal energy, wind power, solar power, and ocean energy together provided some 0.8% of final energy consumption.
productivity • The recent rapid increase in human population over the past three centuries has raised concerns that the planet may not be able to sustain present or future numbers of inhabitants. Loss of Fresh Water • Most of the freshwater resources are either unreachable or too polluted, leaving less than 1% of the world's freshwater, or about 0.003% of all water on Earth, readily accessible for direct human use. • According to the Global Outlook for Water Resources to the Year 2025, it is estimated that by 2025, more than half of the world population will be facing water-based vulnerability and human demand for water will account for 70% of all available freshwater. • Freshwater is the most fundamental finite resource with no substitutes for most uses, yet we are consuming fresh water at least 10 times faster than it is being replenished in regions of northern
the poor section of the public economically. Because the poor section can not afford these fuels, they prefer to use wood so this causes to reduce the forestall areas which are already insufficient. This is why proper Works and investments should be done on new alternative energy sources. Conclusion Every day more and more carbon dioxide is added to atmosphere. Biogas can prevent the further increase of carbon dioxide in atmosphere. I feel that by using biogas we can stop the increase of global warming but we can't reduce already present carbon dioxide level in atmosphere. So the earth remains as polluted as it is but it prevents atmosphere from getting imbalanced more. But it is not a perfect solution. For example I think that hydrogen fuel is way better than biogas fuel, because hydrogen is the most abundant chemical element, constituting roughly 75 % of the Universe's chemical elemental mass. So, I think that biogas is definitely a
annaabi.ee 
Sisene Facebook'ga
Sisene Google'ga
Sisene LinkedIn'ga
Kõik kommentaarid