It all comes down to a choice.
Yes, simply a choice. Not always an easy one, but certainly beneficial in the long run.
Whether to rely on convenient plastic bottled water or carry a heavy metal flask on your next trip?
Should you throw away a wrapper with closed eyes or just tuck it away in your knapsack?
And what about the blaring music playing on your cell phone as you walk though the sleepy woods? Would you wait to finish the song later or let it play on?
And the right choices, the sensible choices can only be made by those who are aware. Aware of what they are doing and how influential that act could be. People don't realise their own power. Their power to destroy or to conserve.
Whatever it is, whichever path they 'choose', they can actually make it happen.