Examlex
PERT charts always use the time unit of individual days.
Acid Rain
Low-pH rain that forms when sulfur dioxide and nitrogen oxides mix with water vapor in the atmosphere.
Sulfur Dioxides
Sulfur dioxide (SO2) is a toxic gas with a pungent, irritating smell, released by volcanoes and industries, and contributing to acid rain.
Nitrogen Oxides
Compounds formed by the reaction of nitrogen and oxygen gases in the air during combustion, especially at high temperatures.
Unpolluted Rainwater
Unpolluted rainwater refers to rain that has not been contaminated by pollutants, making it relatively pure compared with rainwater in areas with high levels of pollution.
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