Answer:
Jahren is a biologist who loves leaves, trees and every life giving plant. In her prologue she replies people that ask her why she doesn't study the ocean even though she lives in Hawaii.
She is deeply concerned about the fate of plants and trees in the world. She feels that there is a lot of tree felling without adequately replacing them and this affects Mother Nature.
According to the biologist, each tree that is felled, each plant that is killed is an unnecessary death. She does not care if the plants were deficient in one vitamin or the another, she does not care if the plant is big or small, it does not matter if it receives enough sunlight or not, that plant should not have been killed.
She firmly believes that the first step to becoming a scientist is is simply to be there and care, not necessarily knowing physics, biology or chemistry.
She makes some rhetorical choices when she says, "Someone died?
Maybe I can convince you" when she was trying to explain why plants shouldn't be killed unnecessarily.
