TAILIEUCHUNG - TREES — THE AIR POLLUTION SOLUTION

But these two points are relatively minor. The main question addressed by our health damages modeling is: just how significant are health damages attributable to maquiladora emissions? On the face of it, the damages are quite serious. Even if we assume conservatively that emissions are controlled at . levels, the iron foundry is accountable for four emergency room visits, thousands of adult respiratory symptom days, and hundreds of asthma attacks every year. If we assume that the level of pollution control is the average between the “no controls” and “ of controls” scenarios, health damages. | TREES - THE AIR POLLUTION SOLUTION Millions of us live in areas where air pollution can cause serious health problems. Ground-level ozone and airborne particles are two pollutants that pose the greatest threat to human health. Carbon dioxide CO2 once thought to be the product of perfect combustion is also now considered a pollution concern. Fortunately trees play an important role in cleaning the air and making our communities healthier places to live. This publication explores how trees clean air and how we can increase their role as air pollution control devices. Center for Urban Forest Research THE TREE SOLUTION CO2 REDUCTION Community trees reduce atmospheric CO2 by storing it or by reducing demand for heating and cooling. On the other hand vehicles chain saws chippers and other equipment release CO2 during the process of planting and maintaining OZONE PARTICULATE REDUCTION Three factors principally affect the uptake of ozone and particulates concentrations of pollutants canopy cover and surface roughness. Sacramento County s 6 million trees remove approximately 1 607 tons of air THE POL OZONE is not emitted directly but is created by chemical reactions between oxides of nitrogen NOx and volatile organic compounds VOCs in sunlight. The rate of ozone formation is increased by higher air temperatures. Emissions from industrial facilities and electric utilities motor vehicle exhaust gas vapors and chemical solvents are some major sources of NOx and VOCs. PARTICULATES Particle pollution consists of microscopic solids or liquid droplets so small that they can be inhaled deep into our lungs causing serious health problems. Most of them start as smoke and diesel soot and form in the air from NOx and sulfur oxides SOx even obscuring our visibility. CO2 is a greenhouse gas that traps the earth s heat and contributes to global warming. Human activities add greenhouse gases to the atmosphere at a rate of about 3 percent of annual natural emissions enough to tip the .

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