He was named the league's 'most valuable player'. [=the player who contributes the most to his team's success]
Clean air is a 'valuable' natural resource that needs to be protected.
A lot of 'valuable' advice/information can be found in this book.
(..) Can't be more than one, two miles away. - How much time? - Half an hour, maybe less. - Tell Mac we move in five. - She goes with us. She's too valuable. She'll give away our position any chance she gets. No deal. You're still under orders, Major. Now, you wanna make that call or should I? (..)1987 Predator