According to what you read in "Hummingbird, Are You For Real?", why is it so important that hummingbird drones can "hover and perch"?

What occured in preparations of war

Like many cities in the south, atlanta was poorly prepared to meet the emergency of the great depression.  which statement  bestdescribes how atlanta was poorly prepared?

Why is the netherlands vulnerable to changes in climate? a. the netherlands is against nuclear power. b. forests in the netherlands have been destroyed by acid rain. c. the netherlands wrote the kyoto protocols. d. the netherlands is low-lying country, and rising sea levels may cause flooding.