The security of our natural resources depend on achieving sustainability. If we deplete our natural resources they will not be there for future generations. Our planet only has limited natural resources and we need to live lightly in the land. Pollution from sewage and storm water can be turned into a resource. Keeping our oceans clean helps maintain the viability of marine life. When we pick up rubbish we break the cycle of pollution. When we plant trees we maintain the sustainability of wildlife habitat, our atmosphere and our renewable natural resources.