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Top 10 Cities With the MOST Smog

Ozone pollution, more popularly known as smog, is a big problem. Smog can inflame and damage the lining of the lungs, which can lead to swelling and restricted airways. Inhaling smog is like getting a sunburn on your lungs. This inflammation can lead to shortness of breath, wheezing, coughing and chest pain. It can also aggravate asthma and bring on attacks.

According to the American Heart Association, chronic exposure to air pollution has been linked to heart disease and stroke. The EPA says that exposure to smog can also affect your immune system's ability to fight off bacterial infections.

High levels of ozone, the main ingredient in smog, can cause irritation to the eyes, nose and throat, even in the average person. Bad levels of ozone are formed when heat and sunlight warm certain pollutants from cars and smokestacks from buildings.

Since summer is coming up, it's something we really need to watch out for. If you exercise outdoors in a place that's heavily smoggy, you may notice that it's more difficult to catch your breath. So on high alert days, you may want to workout inside.

Want to see which cities have the most smog? Then

  1. Los Angeles, California
  2. Visalia-Porterville, California
  3. Bakersfield, California
  4. Fresno, California
  5. Houston, Texas
  6. Merced, California
  7. Sacramento, California
  8. Hanford, California
  9. Knoxville, Tennessee
  10. Dallas-Fort Worth, Texas


Join The Conversation
thehabra thehabra 10 years
Why am I not surprised that LA topped this list?
colormesticky colormesticky 10 years
I wonder if we have higher cancer rates in LA. It's gross when you fly in- as you're landing you can see the line where you stop being in clean air as you come down. All of a sudden it goes from blue to orange. Mmm, smog.
christie christie 10 years
I love just north of Dallas-Fort Worth, great.
brighteyes097 brighteyes097 10 years
Plus, it's surrounded by mountains, which traps the pollution in, like in Santiago, Chile.
clutch26 clutch26 10 years
Big cities + dry, hot climate = smog. I love my home, but on those August days looking out over LA, it's really gross.
joyofadventure joyofadventure 10 years
i just remebered glam, i was watching a show last night about alternative fuels. i agree i think our counrty should start doing more about this problem
joyofadventure joyofadventure 10 years
mostly CA and TX! i was thinking Vegas might be on it, in the morning, if u are far away from the strip and look towards it you can see the smpg hovering over the city!
glam-sugar glam-sugar 10 years
Wow, lots from Cali. Hopefully with the enviro-friendly fuels etc. we can reduce this problem.
juiceejuice juiceejuice 10 years
yeah, every state has its problems. i still love my cali...
hollywoodholiday hollywoodholiday 10 years
ah California... whenever i fly home from school i can see and taste the difference in the air, its pretty gross. but its still the best state in my book!! :D "Love is something more stern and splendid than mere kindness." --The Problem of Pain
PilatesSugar PilatesSugar 10 years
Wow, look at this fine, SAFE state of California... Mmmmmm, smell the fresh air!
ilove2ski ilove2ski 10 years
Looks like I am just fine here in good ol IN ..If you see us in the club we'll be acting real nice if you see us on the floor you'll be watchin all night..
ilove2ski ilove2ski 10 years
Wow, good thing I don't live in CA ..If you see us in the club we'll be acting real nice if you see us on the floor you'll be watchin all night..
SFKitkat SFKitkat 10 years
Wow, 7 of the top 10 are from my fine home state of CA...and here everyone is thinking that CA is such a healthy state and environmentally conscious state...
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