Air Purifying Plants

Does anybody have a good list of air purifying plants, specifically trees and shrubs? I have a client who lives on the corner of a busy street, and would like to purify the air around her house as much as possible and also block the view/noise of the traffic. Any advice would be much appreciated!

this is my list:
bamboo palm
chinese evergreen
english ivy
gerbera daisy
janet craig
marginata
mass cane/ corn plant
mother in laws tongue
pot mum
peace lilly
wameckii

not really "my" list

I'm looking for more drought tolerant/hardy varieties if possible as I'm out here in Southern California. I notice a lot of those need a good amount of humidity which we just don't have. I've found something about Cherry Sage purifying certain toxins but I can't find many details, as most of the info on the internet is for indoor plants... Thanks!

Moss, not really the type of plant you where thinking but they do clean the heck out of air and they are very drought tolerant. you have lots of varieties native to your area. Might freak the neighbors but then most of them probably grow grass.

Also don't neglect indoor air purification. Areca (butterfly) palm, money plant, and snake tongue all do different things to help clean up your air inside.