No its not cow flatulence.
Urban design today means that many people drive a long way to school,cafe’s,work or a religious place. Having everything at a walking distance would mean that we burn more calories and less oil.
Have it the other way and we burn less calories and more oil, thereby adversely affecting the environment we live in.
So either we die fast, or we consume more to extend our life – which means we destroy the system faster, yeah – typical cul de sac!