According to the study when trees emit pollen, that makes clouds, which in turn makes rain and that feeds back into the trees and can influence the whole growth cycle of the plant.
Prof Steiner tested pollen from oak, pecan, birch, cedar and pine trees, as well as ragweed. They soaked 2 g from each source in pure water for an hour and used an atomizer to make a spray of the moist pollen fragments. They then sent the spray into a cloud-making chamber.
The scientists found that three different sizes of particles – 50, 100 and 200 nanometers – began to pull in moisture and form clouds. Cloud droplets are ten times larger than the pollen fragments, and the team used an optical particle counter to count them as they exited the cloud chamber.
Great Logic has lead to new idea.