Everything you do actively creates your experience, in the past, now and in the future. Practicing mindfulness in your everyday living and adopting a mindset of sustainability allows you to live in harmony with yourself and the world around you.
In relation to sustainability, it involves developing a consciousness of cause and effect. In other words, being aware of how your behavior affects the current situation, as well as being aware of future implications. It is similar to the practices of ahimsa and karma in yoga philosophy.