By Naima Pearce
The noisemakers and party hats passed around on Dec. 31st weren't just for the celebration of the new year – it was also the birthday of the Clean Air Act. A mere 40 years ago, President Richard Nixon signed the 1970 bill into law, citing the bipartisan effort as an achievement for all parties and all Americans. December 31st couldn't have been a more symbolic day for the Clean Air Act's birthday as it was the day we looked forward at how we as a people would map our future, grow, and change for the better.