sept 24 (environment health)

sept 24 (environment health) - Facts About Water 80% of the...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Facts About Water 80% of the Earth’s surface is water But… 97% is saltwater 2% is frozen in polar ice- caps Only 1% is readily available for consumption Water Usage Water Treatment Primary Solid/liquid separation Secondary Bacteria added sludge Tertiary Additional Treatment Health Issues Shortages Quality —mercury, lead, Polychlorinated biphenyls, heavy metals, medicines
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
—“good up high, bad nearby” GROUND LEVEL OZONE NOx + VOC + O 2 + sunlight Health Effects Can damage lungs Chest pain, nausea, throat irritation, can worsen breathing/lung conditions Other effects Damage crop quality $2-$3 billion/year loss HIGH ALTITUDE OZONE Destroyed by CFCs Chlorofluorocarbons (CFC) Refrigerants, solvents, insulating foams 1 Chlorine = 100,000 ozone Takes decades for CFCs Also destroyed by Bromides Pesticides, fire ext., solvents
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 11/04/2011 for the course HLTH 140 at Maryland.

Page1 / 5

sept 24 (environment health) - Facts About Water 80% of the...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online