Xem 1-20 trên 48 kết quả Greenhouse gases
  • Greenhouse gases, such as carbon dioxide, nitrous oxide, methane, and ozone, play an important role in balancing the temperature of the Earth’s surface by absorbing and emitting radiation within the thermal infrared range from the source. However, with the enormous burning of fossil fuels from the industrial revolution, the concentration of greenhouse gases in the atmosphere has greatly increased.

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  • Understanding greenhouse gas sources, emissions, measurements, and management is essential for capture, utilization, reduction, and storage of greenhouse gas, which plays a crucial role in issues such as global warming and climate change. Taking advantage of the authors' experience in greenhouse gases, this book discusses an overview of recently developed techniques, methods, and strategies: - A comprehensive source investigation of greenhouse gases that are emitted from hydrocarbon reservoirs, vehicle transportation, agricultural landscapes, farms, non-cattle confined buildings, and so on.

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  • Greenhouse gases are accumulating in Earth’s atmosphere as a result of human activities, causing surface air temperatures and subsurface ocean temperatures to rise. Temperatures are, in fact, rising. The changes observed over the last several decades are likely mostly due to human activities, but we cannot rule out that some significant part of these changes is also a reflection of natural variability. Human-induced warming and associated sea level rises are expected to continue through the 21st century.

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  • Global warming is the rising average temperature of Earth's atmosphere and oceans since the late 19th century and its projected continuation. Since the early 20th century, Earth's average surface temperature has increased by about 0.8 °C, with about two thirds of the increase occurring since 1980. Warming of the climate system is unequivocal, and scientists are more than 90% certain that most of it is caused by increasing concentrations of greenhouse gases produced by human activities such as deforestation and the burning of fossil fuels.

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  • Water vapor is the dominant greenhouse gas, the most important gaseous source of infrared opacity in the atmosphere. As the concentrations of other greenhouse gases, particularly carbon dioxide, increase because of human activity, it is centrally important to predict howthewater vapor distribution will be affected. To the extent that water vapor concentrations increase in a warmer world, the climatic effects of the other greenhouse gases will be amplified.

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  • Facts on Climate Change A summary of the 2007 Assessment Report of the IPCC CLIMATE CHANGE is already having measurable consequences and future impacts are expected to A summary by: be wide-ranging and costly. How can we adapt to such changes or limit their extent? The latest findings of the IPCC provide some answers. .

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  • Glaciers are melting, sea levels are rising, cloud forests are drying, and wildlife is scrambling to keep pace. It's becoming clear that humans have caused most of the past century's warming by releasing heat-trapping gases as we power our modern lives. Called greenhouse gases, their levels are higher now than in the last 650,000 years.

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  • Climate change is a very real and urgent global issue. Its consequences are being experienced every day. We read about it in newspapers, hear it debated in Parliament and our children learn about it in school. It’s a problem we all share, because every single country will be affected. Together, today, we must take action to adapt to it and stop it — or, at least, slow it down. your essential guide It’s now clear that the emission of man-made greenhouse gases is causing climate change. The rate of change began as significant, has become alarming and is simply unsustainable in the...

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  • Scientists predict the earth is facing 40-to-60 years of climate change, even if emissions of carbon dioxide and other global warming gases stopped today. One inevitable consequence of the greenhouse gases already in the atmosphere will be an increase in the frequency and severity of natural disaster events. Global Warming, Natural Hazards, and Emergency Management documents the imperative need for communities to prepare for the coming effects of climate change and provides a series of in-depth, road-tested recommendations on how to reduce risks for communities and businesses.

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  • Climate change is one of the most urgent issues of our time. It is the greatest environmental challenge we face today as a global community. Photo: Flooding in Boscastle, Cornwall, 2004 An indication of the type of event that scientists say will become more frequent in the future. .Given the enormity of the problem of climate change and its consequences – heatwaves, flooding, more frequent storms – people may find it hard to believe that they can do anything to help.

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  • The earth’s atmosphere is made up of a delicately balanced layer of ‘greenhouse gases’. This layer acts like a blanket, trapping enough heat to sustain life. Humans are burning huge amounts of fossil fuels – adding more and more greenhouse gases to the atmosphere and making this blanket thicker. This traps more and more heat, warming the globe and throwing our climate into chaos. Climate change is already underway.

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  • In the long term, the earth must shed energy into space at the same rate at which it absorbs energy from the sun. Solar energy arrives in the form of shortwavelength radiation. Some of this radiation is reflected away by the earth's surface and atmosphere. Most of it, however, passes straight through the atmosphere to warm the earth's surface. The earth gets rid of this energy (sends it back out into space) in the form of long wavelength, infra-red radiation.

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  • With increasing energy demands, dwindling fossil energy resources, and environmental concerns associated with criteria pollutants and greenhouse gases, significant attention in the power generation community has been focused on increasing efficiency and reducing emissions. A highly efficient and low-emission concept is the fuel cell gas turbine (GT) hybrid. Hybrid systems are comprised of fuel cells integrated with a GT engine. A variety of potential configurations have been proposed and a number of cycles have been investigated.

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  • Anthropogenic air pollution constitutes of many substances. Greenhouse gases absorb and reflect some of the infrared parts of solar radiation reflected from the earth surface thus causing the troposphere to be warmer. Among others, these substances are carbone-dioxide, water vapour, hydrogen oxides, nitrogen-oxides and methane. Beyond causing warming, most of these gases are poisonous to the Earth’s biosphere. Besides greenhouse gases, there are a few more poisonous substances which have anthropogenic sources.

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  • The atmosphere is the layer of air surrounding the earth and its structure below 50 km is most important in determining pollution levels. In this sense, greenhouse effect and climate change are evoking a special interest recently since they are considered to be human hazards. Greenhouse effect is produced by infrared radiations, imprisoned between the earth and the thin layer of greenhouse gases, which get reflected and heat up the earth’s surface.

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  • In order to secure the energy supply to an increasing population and at the same time limit the damage to Earth, i.e. avoiding a fatal climate change as a result of anthropogenic emissions of greenhouse gases (primarily CO2), immediate action is necessary. This includes reducing the energy consumption, increasing the energy conversion efficiency, and using renewable energies. The transport sector is the one most dependent on fossil energy and it stands for a significant part of the energy consumption in the world.

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  • Because there is no clear definition of the asthma phenotype, researchers studying the development of this complex disease turn to characteristics that can be measured objectively, such as atopy (manifested as the presence of positive skin-prick tests or the clinical response to common environmental allergens), airway hyperresponsiveness (the tendency of airways to narrow excessively in response to triggers that have little or no effect in normal individuals), and other measures of allergic sensitization.

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  • Khí nhà kính TÁC GIỚI THIỆU khả năng mà con người tạo ra lượng khí thải carbon dioxide và tia hồng ngoại khí khác hấp thụ có thể tăng cường hiệu ứng nhà kính tự nhiên và dẫn đến sự nóng lên của những thay đổi không khí và tiếp viên trong các tham số khí hậu khác như lượng mưa, tuyết và băng bao gồm, độ ẩm đất và mực nước biển tăng lên, tạo thành có lẽ phức tạp và gây tranh cãi nhất của tất cả các vấn đề môi trường và một trong đó là có khả...

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  • This book is intended to introduce the reader to examples of the range of practical problems posed by "Global Warming". It includes 11 chapters split into 5 sections. Section 1 outlines the recent changes in the Indian Monsoon, the importance of greenhouse gases to life, and the relative importance of changes in solar radiation in causing the changes.

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  • nformation Technology is responsible for approximately 2% of the world’s emission of greenhouse gases. The IT sector itself contributes to these greenhouse gas emissions, through its massive consumption of energy - and therefore continuously exacerbates the problem. At the same time, however, the IT industry can provide the

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