Hii!
For starters, we could pick up trash. We could lower the amount of toxic waste we use. We could limit the water we use. And start walking to places,instead of using cars,and motorcycles that use high amount of toxic chemicals. We could lower the amount of plastic we throw away. We could recycle, we could recycle say a old broken barbie doll to make a new barbie doll. Every walked around Wal-Mart and see on the workers vests "6 bottles recycled to make this vest".? We can save the earth. We could plant more plants instead of using high powered machinery to make our food.
Hope this helps.