Register for an account

X

Enter your name and email address below.

Your email address is used to log in and will not be shared or sold. Read our privacy policy.

X

Website access code

Enter your access code into the form field below.

If you are a Zinio, Nook, Kindle, Apple, or Google Play subscriber, you can enter your website access code to gain subscriber access. Your website access code is located in the upper right corner of the Table of Contents page of your digital edition.

Technology

Hope for Los Angeles, A City That Needs It

Newsletter

Sign up for our email newsletter for the latest science news

Melvin Prueitt of Los Alamos National Laboratory in New Mexico received patents last January for an air purifying tower for large smog- filled cities. At the top of the 650-foot tower, which would be made of metal beams covered with a fiberglass shell, a spray of fine, electrostatically charged mist would humidify the air. It would make the air cooler and cause it to sink, thus creating a downdraft that would suck more air into the tower. Since pollutants would cling to the charged droplets, they would be washed away when the mist condenses at the bottom of the tower. Clean air, humidified by the remaining water vapor, would waft out of the bottom. Prueitt figures that a mere 190 towers could scrub the smog out of a city like Los Angeles without inflicting noticeable aesthetic damage to the skyline.

2 Free Articles Left

Want it all? Get unlimited access when you subscribe.

Subscribe

Already a subscriber? Register or Log In

Want unlimited access?

Subscribe today and save 75%

Subscribe

Already a subscriber? Register or Log In