usable as lumber‚ only plants above a specified height or only perennial species. At its broadest‚ trees include the taller palms‚ the tree ferns‚ bananas and bamboo. A tree typically has many secondary branches supported clear of the ground by the trunk. This trunk typically contains woody tissue for strength‚ and vascular tissue to carry materials from one part of the tree to another. For most trees it is surrounded by a layer of bark which serves as a protective barrier. Below the ground‚ the
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Introduction: When air gets polluted with dust‚ smoke‚ motor vehicles‚ mills and factories etc. is called air pollution. We know that air is an important element of our environment. But it is a matter of great regret that it is being polluted day by day in different reasons. Causes of Air pollution: There are different kinds of reasons of air pollution. The causes of air pollution are described below. 1. Using poison in agriculture: In agricultural sectors‚ farmers often use insecticides
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SAVE TREES Trees are very important for our survival in many ways. They clean the soil by filtering sewage and chemicals used in farms. They help control noise pollution and reduce flash flooding. Trees absorb carbon dioxide which contributes to global warming. They also clean the air by absorbing pollutants like carbon monoxide and sulphur dioxide. They also help to lower temperatures. They give shade during the summer and act as windbreaks during winter if they are located on the windward side
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Air pollution Air pollution is the introduction of chemicals‚ particulate matter‚ or biological materials that cause harm or discomfort to humans or other living organisms‚ or cause damage to the natural environment or built environment‚ into the atmosphere. 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
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provided funding for research of air pollution. The Clean Air Act of 1963 was the 1st designed to control air pollution. The 1955 Air Pollution Control Act was the 1st U.S. federal law that focused on air pollution. The Clean Air Act accomplished this by setting up a federal program within the U.S. Public Health Service & allowing research into techniques for monitoring & controlling air pollution. It was 1st amended in 1965‚ by the Motor Vehicle Air Pollution‚ which authorized the federal government
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Environmental Report on the Value of Trees Trees play a significant part in our community and to our local wildlife as they improve and provide a number of important environmental benefits. They provide better air quality for us by filtering the airborne pollutants and by removing the atmospheric carbon dioxide from the atmosphere and places with cleaner air (places with more trees) extend people’s life force by months or even years. This impacts the organisms by contributing to the carbon cycle
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Asthma and air pollution What is Asthma? Asthma is a chronic disease that affects the air passages of the lungs. It´s characterized by recurrent attacks of wheezing and loss of breath. These episodes or attacks can happen many times a day‚ a week or when exposed to certain substances or in specific physical activity. The World Health Organization estimates that around the world about 300 million people suffer asthma‚ the majority children. In fact it is consider the most common chronic disease
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List possible solutions for air‚ water‚ and land pollution. Pollution is the presentation of contaminants into the indigenous habitat that cause unfavorable change. Contamination can take the type of concoction substances. Pollution can affect our daily lifestyle. Air pollution‚ water pollution‚ and land pollution is the common things that are highly polluted. All of these pollutants can be prevented and solved with. These can be solved if we use all try to prevent using certain things and
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Engineering Production 1 (EngM 324) Cutting Tool Angles and their Significance Dr. Amr Shehata Fayed‚ Ph.D. Associate Professor Importance of clearance angle in cutting process P Leading Edge Cutting F Tool Workpiece (a) Heel fouls work and prevents leading edge from cutting Dr. Amr Shehata Fayed Mech. Eng. Dept.‚ College of Engineering‚ Jazan University Cutting Tool Angles – Page 2 Clearance Angle (a) Flat Surface (6o to 8o) P F Clearance angle (b) Heel
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19/12/2013 Indoor Air-pollution and health Introduction: We are living things that need to breathe‚ no doubt of that. Every few seconds we need to inhale a small quantity of air. Unfortunately‚ the air we breathe in has become more and more polluted owning to a multitude of factors such as: increase in number of vehicles‚ increase usage of synthetic materials for buildings and homes‚ lack of awareness towards potentially hazardous microorganisms such as fungi and so on. Air pollutants – any one
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