It is a problem, or rather, becoming denser is the best tool cities have to tackling THE problem of our time, which is climate change. One of the best ways tha

It is a problem, or rather, becoming denser is the best tool cities have to tackling THE problem of our time, which is climate change. One of the best ways that cities can contribute to lowering CO2 emissions is to make it so that the city is designed in such a way that a car is not a mandatory requirement for travel. Creating reasonably dense residential/commercial communities that are traversable by walking and active transportation instead of sprawling out to the horizon is how to achieve this.