Allen Cowgill https://twitter.com/AllenCowgill Allen Cowgill is a Denver advocate focused on safer streets and sustainable transportation. He is a member of the Denver Bicycle Lobby and is on Twitter at @AllenCowgill. Recent Posts This post is supported by Readers like you. Give now. Commentary: I-270 Expansion Will Harm Latino Communities, Increase Air Pollution, and Accelerate Climate Change By Allen Cowgill | Feb 23, 2021 | No Comments Allen Cowgill: Expanding I-270 will increase pollution in neighborhoods inhabited mostly by people of color and could accelerate climate change by encouraging more people to drive.