the youth (young) have the future in their hands
they are concerned about the destruction (destroy) of the rain forest
her parents encourage (courage) her to apply for the job
you should ask for permission (permit) if you want to go out
as a nurse, Julia has spent her life caring for the sick (sick)
Scientists (science) say 5,000 species of plants are eliminated
gravity is one of the most important discovery ( discover) of newton