Is it harder to meditate in a city?

[zenmaster]

I find my mind alot more peaceful when I'm out in nature. Do any of you find a difference in ease of meditation in a city vs. a small town or forest? I think it could be things like the electromagnetic radiation, noise, pollution, and what Ra called aura infringement - alot of people living too close to each other.

I look at it as analogous to weight training. To overcome obstacles (to certain forms of meditation) such as those found in the city requires more discipline than the serene, rural environment, for example.