Please write a public service advertisement for the lawn, calling on people to care for flowers, trees and nature.

Leave some green for our children and grandchildren! Save some water for our children and grandchildren to drink! Leave some air for our children and grandchildren to breathe!

In the time machine, I came to the future. The sky is dim, and the strong wind makes me unable to smoke. I want to find a house to have a rest, but it's all yellow sand and I can't see the house at all. Walking, I finally found a hole like a house and went in. There are people inside, and everyone is huddled in the corner to have a rest. I was thirsty all the way. I asked people where there was water, but they just stretched out their fingers lazily. Is that water drinkable? It's just a pool of mud Suddenly there was an earthquake, and people screamed and screamed, which woke me up from my dream. It's already morning. I opened the window and breathed fresh air, feeling refreshed. This is much better than the dream.