Xem 1-20 trên 32 kết quả Greenhouse effect
  • Modern urban Air Pollution Stagnant air Continuing emissions "summer" (photochemical) smog: NO, NO2, CxHy, UV-rad: == O3 (reactions worked out on blackboard) Winter (cold weather) smog: fine or ultra-fine particles == health effects Mixture is different in different cities Traffic important source Toxicological mechanism still unknown Health effects even at low concentrations (from 40 mg/m3?)

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  • Definition “The earth is a natural greenhouse and is kept warm by water vapors, carbon dioxide (CO2), and other gases in the atmosphere, which absorb the sun’s energy and radiate it back toward the earth. This type of warming is called ‘natural greenhouse effect’. ‘Enhanced greenhouse effect’, on the other hand, causes global warming due to excessive levels of CO2 in the atmosphere.” Facts Average temperatures have climbed 1.4 degrees Fahrenheit (0.

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  • Plants are continuously affected by a variety of environmental factors. Whereas biotic environmental factors are other organisms such as symbionts, parasites, pathogens, herbivores, and competitors, abiotic factors include parameters and resources which determine plant growth like temperature, relative humidity, light, availability of water, mineral nutrients, and CO 2 , as well as wind, ionizing radiation, or pollutants (Schulze et al. 2002 ) . The effect each abiotic factor has on the plant depends on its quantity or intensity.

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  • Unit 6. The Greenhouse effect Nguyễn Thị Minh Nguyệt Tiếng anh chuyên ngành Thổ nhưỡngvà Môi trường đất NXB Đại học quốc gia Hà Nội 2007. Tr 55 – 65. Tài liệu trong Thư viện điện tử ĐH Khoa học Tự nhiên có thể được sử dụng cho mục đích học tập và nghiên cứu cá nhân. Nghiêm cấm mọi hình thức sao chép, in ấn phục vụ các mục đích khác nếu không được sự chấp thuận của nhà xuất

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  • Explores public and government involvement in combating global warming, and reviews conservation programs that have been developed by countries, international institutions, private organizations, and individuals.Global warming is the rising average temperature of Earth's atmosphere and oceans since the late 19th century and its projected continuation.

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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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  • The atmosphere of Earth is a layer of gases surrounding the planet Earth that is retained by Earth's gravity. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation, warming the surface through heat retention (greenhouse effect), and reducing temperature extremes between day and night (the diurnal temperature variation).

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  • Elements of present-day sea use management have evolved over a long period. Basic to these are the principles of freedom of the seas, open access to resources, and sectoral management. There is, however, a necessary corrective to this Euro-centric view when the relationships between people and the marine environment are examined in several other cultures. Open access in Western society has experienced more recent restrictions as resource scarcities have arisen and new technological capacities have increased.

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  • Several years ago the Open University in Heerlen and Maastricht University decided to launch a course on ‘Climate and the Environment’, with a diverse team of authors. Both natural and social scientists, from several regions of the world, contributed to this book. Initially, the book was intended as a textbook within this course for students of Environmental Sciences programmes at the Open University and Maastricht University. As the book developed it became clear that it would be an excellent source to anyone professionally engaged in the wide area of the enhance greenhouse effect....

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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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  • Today there is not a single aspect of the world that can escape the scrutiny of environmental analysis, and business activities stand at the crux of many issues. Some of the issues that today’s executives need to understand to be environmentally literate include: air, water, and land pollution; the production and disposal of hazardous wastes; solid waste disposal; chemical and nuclear spills and accidents; global warming and the greenhouse effect; ozone depletion; deforestation and desertification; biodiversity, and overpopulation.

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  • The burning of fossil fuels puts into the atmosphere carbon dioxide, which is causing gradual global warming. This 'greenhouse effect' may by early next century have increased average global temperatures enough to shift agricultural production areas, raise sea levels to flood coastal cities, and disrupt national economies.

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  • An experiment was carried out in the greenhouse conditions with Brassica juncea L. grown on alluvial soils that had previously been contaminated at different concentrations of Cu. The main purposes of the research were to determine the effects of Cu and phosphorus applications on plant growth and Cu uptake by Brassica juncea L. Mature plants were harvested for the Cu accumulation analysis. The soil samples from each growing pot were extracted by HNO3 0.

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  • Because time-series studies focus on a given geographic location over a number of years, factors that are often thought to influence the health of the population, such as percentage of smokers, income level, occupational exposure to pollutants, access to medical care and age distribution, do not need to be incorporated into the analysis as they are considered to remain relatively constant within the study area over time. Typically, the only other factors aside from pollution included in these models are weather variables and seasonal controls.

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  • The initiative aims to complement the 5 year cyclic plan, the National Medium Term Development Plan (RPJPM) 20102014, as well as the 20 year National Long Term Development Plan (RPJPN) 20052023. The national government has also committed to reduce green house gases though the National Action Plan for Greenhouse Gas (RAN GRK) and Reducing Emissions from Deforestation and Forest Degradation (REDD+). Such plans are expected to be in line with the National Spatial Plan (RTRWN) which is yet to be completed. ...

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  • Almost all motorized transportation today involves the combustion of fossil fuels, which produces energy to be transformed into motion. This combustion is the reaction of the hydrogen and carbon present in the fuels with oxygen in the air to produce–in the ideal world–water vapour (H2O) and carbon dioxide (CO2). Neither of these products is damaging to human health.

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  • Bài giảng "Hóa học môi trường không khí" cung cấp cho người học các kiến thức: Tầng ozone, cơ chế tạo thành tầng ozone, phổ hấp thu của DNA, ảnh hưởng của sự suy giảm ozone, how the Greenhouse Effect Actually Works, greenhouse Gas Feedback, correlation Does Not Equal Causatio,... Mời các bạn cùng tham khảo nội dung chi tiết.

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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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  • By general consent Minnesota has enjoyed a superior reputation for climate, soil, and scenery beyond that of any other State in the Union, with, perhaps, a single exception. The real ground of this pre-eminence, especially in climate, has not been well understood, owing, probably, in part, to the slight acquaintance with the general features and characteristics of the State itself, and, in part, to that want of attention which the subject of climatology and its effects on the health of mankind has deserved.

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  • Exposure to tobacco smoke both prenatally and after birth is associated with measurable harmful effects including a greater risk of developing asthma-like symptoms in early childhood. However, evidence of increased risk of allergic diseases is uncertain77, 78. Distinguishing the independent contributions of prenatal and postnatal maternal smoking is problematic79. However, studies of lung function immediately after birth have shown that maternal smoking during pregnancy has an influence on lung development37.

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