Introduction to Environmental Engineering. What is Environmental Engineering? Definition: The application of science and engineering knowledge and concepts.

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Presentation transcript:

Introduction to Environmental Engineering

What is Environmental Engineering? Definition: The application of science and engineering knowledge and concepts to care for and/or restore our natural environment and/or solve environmental problems.

Who does it affect? Everyone & Everything! Everyone & Everything! – plants – insects – animals – humans – ecosystems – our planet

What are environmental issues? Three areas: Three areas: – air quality – land quality – water quality

Air Quality Poor air quality can lead to: smog smog respiratory & other illnesses respiratory & other illnesses acid rain acid rain global warming global warming Why is air quality such a problem?

From where do air pollutants come? Air pollution in China

Air Quality Air pollutant: A known substance in the air that can cause harm to humans and the environment. Air pollutant: A known substance in the air that can cause harm to humans and the environment. – nitrogen oxides (NO x ) – sulfur oxides (SO x ) – carbon monoxide (CO) – carbon dioxide (CO 2 ) Effects of acid rain on plants

Greenhouse Gases & Global Warming Global warming: An increase in the average air temperature of the Earth. Global warming: An increase in the average air temperature of the Earth. Greenhouse effect: Heat from the sun gets trapped inside the glass of a greenhouse and heats up its air. Greenhouse effect: Heat from the sun gets trapped inside the glass of a greenhouse and heats up its air. More carbon dioxide (CO 2 ) being released in the atmosphere traps more heat. More carbon dioxide (CO 2 ) being released in the atmosphere traps more heat.

How do we reduce air pollutants? carpool carpool hybrid cars hybrid cars EPA government regulation EPA government regulation NEW: geologic carbon sequestration NEW: geologic carbon sequestration alternative fuels alternative fuels walk, bike or use public transportation walk, bike or use public transportation

Land Quality Land pollution: Destruction of the Earth’s surface caused by human activities and the misuse of natural resources. Land pollution: Destruction of the Earth’s surface caused by human activities and the misuse of natural resources. Natural resources: Land and raw materials that exist naturally in the environment undisturbed by humans. Natural resources: Land and raw materials that exist naturally in the environment undisturbed by humans. Renewable resource: A natural resource that can be replaced by a natural process. Renewable resource: A natural resource that can be replaced by a natural process. Non-renewable resource: A natural resource that cannot be produced or re-grown or reused. Non-renewable resource: A natural resource that cannot be produced or re-grown or reused.

Examples Renewable Resources Non-Renewable Resources

What problems arise from land pollution? Acid mine drainage Landfills Pesticides and herbicides

How do we reduce land pollution?