The Mall of America is using 72,000 ladybugs as pest control!
We've had facts before about how big the Mall of America is. To recap: It's huge. It's so big, it has a full theme park inside and 7 Yankee stadiums could fit inside. The Mall has over 30,000 live plants, including 400 trees. As a result, the Mall also has pests that affect plants.
Aphids feed on plants and are generally a gardener's bad news. To keep the aphid population down, the Mall of America groundskeepers recently released about 72,000 ladybugs in the mall. Ladybugs prey on Aphids and will hopefully keep the mall's plants green and happy.
(Source)
Read more at http://www.omg-facts.com/category/4/Animals#zwvKM6xJTtW1QZgW.99