Answer:
The line alluded by David Brain “Only we, their children, linger to endure the world they left us: a lush, green placid world we call The Wasteland.” simply means that, those who were young when the war happened were left to live in the carcas of the environment that remained in the world after its destruction.
That the world was once a beautiful place but was turned into a waste as a result of the war.
Step-by-step explanation: