ENV100Y5 Lecture Notes - Lecture 4: Acid Rain, Radon, Indoor Air Quality
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ENV100Y5 Full Course Notes
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Env100: module 4 session 45, 46 & 47 (air pollution & ozone) Outdoor air pollution affects climate and harms people and ecosystems . Air pollutants = gases and particulate material added to the atmosphere. Has decreased in recent decades due to government policy and improved technologies in developed countries. Developing countries and urban areas still have significant problems. 100s of millions of tonnes of dust (solid aerosol particles) are blown westward across the. Atlantic ocean by trade winds every year and across the pacific ocean by jet streams. Major source of salt moving from ocean to land-based reservoirs. Pollutes atmosphere with smoke: soot (tiny solid particles) and gases. Over 60 million ha of forests and grasslands burn each year. Fires are natural some forests are completely adapted (e. g. , boreal forests) Fires are made more severe by human action. Decades of fire suppression fuel build-up. Large quantities of particulate matter (ash), aerosols, sulphur dioxide, and other volcanic gases.
