The idea in cloud seeding is to first find clouds that have too low a ratio of ice crystals to droplets and then to add enough artificial ice nuclei so that the ratio of crystals to droplets is about ____.?
a. ?1:100
b. ?1:1,000
c. ?1:10,000
d. ?1:100,000
e. ?1:1,000,000
ANSWER: d
Environmental & Atmospheric Sciences
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