1) Humans and many other organisms depend on Earth for survival. If action is not taken, future generations may not be able to enjoy Earth. 2) The atmosphere is weakening due to issues like deforestation. Planting more trees and protecting rainforests can help create more oxygen while benefiting humans, atmosphere, and species. 3) Individual actions like using renewable energy, hybrid vehicles, and recycling can help address issues like fossil fuel use and protect the planet. Everyone should follow the "Reduce, Reuse, Recycle" approach.