There are over 7 billion people in the world today. While an impressive number- that means that there are over 7 billion people using the Earth's natural resources.
Before you think- "well, just stop using natural resources!" it is important to note that it isn't that easy to just stop the heavy usage of these resources. Water is essential to life. Phosphorous is vital for plant growth. However, being mindful of the fact that our natural resources shouldn't be wasted is never a bad thing. Turning off a running tap might not seem like a big deal, but imagine if even a fraction of 7 billion people did the same thing.
