Wind-pollinated trees and shrubs bloom more often before leaves bloom, and as a rule much more pollen is formed

Wind-pollinated trees and shrubs bloom more often before leaves bloom, and as a rule much more pollen is formed in their stamens than insect-pollinated ones. Explain what it is connected with.

1) Pollination before the leaves bloom occurs so that the pollen transferred by the wind does not settle on the leaves.
2) A large amount of pollen from wind-pollinated plants is due to the fact that a lot of pollen is lost, because the wind can carry pollen to any place. In order to guarantee pollination, wind-pollinated plants must make more pollen than insect-pollinated.