1. Don't waste water.
2. Recycle all the possible one.
3. Use renewable energies if I can.
4. Turn off unnecessary lights.
5. Plant a tree; it will absorb one ton of carbon dioxide over its lifetime.
Stop and think...
"You look at that river gently flowing by. You notice the leaves rustling with the wind. You hear the birds; you hear the tree frogs. In the distance you hear a cow. You feel the grass. The mud gives a little bit on the river bank. It’s quiet; it’s peaceful. And all of a sudden, it’s a gear shift inside you. And it’s like taking a deep breath and going, 'Oh yeah, I forgot about this'." ~ Al Gore in the opening monologue of An Inconvenient Truth.
Some of the sentences you've read or listened to are really striking.
Choose one that you specially liked:
"We have to act together to save this global crisis."