Why Rooftop Gardens Cool Cities

Sourced from Yale Climate Connections

They're not just a good-looking addition.

City rooftops are getting a makeover. Instead of concrete, many are now covered by grasses, flowers, and even small trees.

Andy Creath, president of Green Roofs of Colorado, says green roofs are not just pretty. They benefit the climate too.

Creath: “Green roofs actually cool cities.”

By replacing heat-absorbing materials like concrete and tar, green roofs help to lower the temperature of the air around them. And, they act as insulators for buildings, which reduces the energy needed for heating and cooling.

Plus, green roofs absorb water, which helps reduce storm run-off. They can create habitat for birds and pollinators. And in some places, they’re even used to grow vegetables.

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