I'll bite. Of those three industry and agriculture I can have no control over. Both are going to be roughly the same in the suburbs as in the cities. However

I'll bite. Of those three industry and agriculture I can have no control over. Both are going to be roughly the same in the suburbs as in the cities. However heat is radically different if you live in an apartment than if you live in a detached house on a plot of land. Not only are you sharing walls with other people but also your living spaces tend to be much smaller. Smaller also tends to mean less 'stuff' which means less industry to produce such stuff. Smaller also tends to mean less building material which again reduces industry. That combined with the much reduced energy costs of transportation means that city living is much better for the environment than outside the cities.