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=﻿ //SMOG :) <3 // = ** Synonyms: **  brume, fog, gauze, mist, murk, reek, haze, soup.     Example: The city's smog was so bad that the darkness force showed during the day .   the word smog comes from the combination of fog & smoke . its mixed with smoke & pollution .   i t reacts in the atmosphere with the light from the sun to form potionsllu .   it is also caused by alot of coal that burns in one place .   en.wikipedia.org/wiki/Environmentally_**friendly**

=  topic1-smog   = = smog and hybrid vehicles  =

Smog is made up of a combination of air pollutants that can compromise human health, harm the environment, and even cause property damage.
Smog can cause or aggravate health problems such as asthma, emphysema, chronic bronchitis and other respiratory problems as well as eye irritation and reduced resistance to colds and lung infections.

new york city, china,, and mexico city are heavily affecdted by smog clouds.

how has urbanization caused this problem?
excessive urbanization and industrialization contributed because of the hight concentration of vehicles and human pollutants .clustered close emit high big buildings levels of pollutants that settle in the surrounding city.

hybrid vehicles
A hybrid vehicles is a vehicle that uses two or more distinct power sources to move the vehicle.The term most commonly refers to hybrid vehicles (HEVs), which combine a gas engine and one or more electric motor.

how do they work?[[image:http://michaeljlewis.files.wordpress.com/2009/10/list_of_hybrid_cars_4.jpg]]
Hybrid-electric vehicles (HEVs) combine the benefits of gasoline engines and electric motors and can be configured to obtain different objectives, such as improved fuel economy, increased power

how does it help the enviroment?
 * .increased fuel efficiency
 * .less pollution
 * .quiet ride
 * .evolved the combustion engine
 * .saving the enviroment

negetive effects of hybrids
 * high gas price
 * .low performance
 * .low milage ranges
 * long recharge times[[image:http://www.chemistryland.com/CHM107Lab/Exp03_DetectOzone/OzoneLab/Ozone-ppb-chartBlank.gif width="412" height="394"]]