"residential high-rises packed with greenery, which can help cities build for density while improving air quality."
"this pair of towers can transform approximately 44,000 pounds of carbon dioxide into oxygen each year... can also keep temperatures cool indoors and filter out fine dust particles and noise pollution from traffic below."
Design hurdles: "how can a tree resist extremely windy conditions at 400 feet in the air? Engineers then had to devise a way to secure the roots of the plants in their containers while making sure they could be properly watered and fertilized."
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