Seattle
This California city was the first permanent Spanish settlement in the state and is considered the state's birthplace. It is also referred to as "America's Finest City"
What is San Diego?
The Space Needle was originally constructed in 1962 for the World's Fair. The roof is currently white like the rest of the space needle, but sported this color when it was originally built
What is Galaxy Gold?
Will also accept: orange, copper, gold
This event in 1952 London was caused by air pollution and a stagnant high-pressure system over the city. It was also one of the driving factors that lead to the creation of the Clean Air Act
What is the Great Smog?
This east coast city was the first location of the US capitol from 1785 to 1790 before moving to Philadelphia and then permanently to Washington D.C. in 1800
What is New York City?
The original NAAQS standards were implemented in 1971. PM2.5 wasn't added to the list until 1997 with an annual standard of 15 µg/m3 and this 24-hr standard.
What is 65 µg/m3?