A few months back, I wrote a few entries on Chicago's green roof movement, which is cooling the city and recycling water. Well, city officials are at it again, so I'll be featuring some of their innovative projects all week.The first starts with the "green alley" initiative. Chicago has the largest network of intertwining alleys in the country and they are slowly replacing the pavement in older alleys with recyclable material. This material absorbs the sun rays, keeping the city cooler, allows water to pass through it to the underground water table and even costs less than traditional concrete.
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