Small Changes can have an impact on the enviroment

It sometimes seems that there is not much we can do to change the forces of nature, but Pope Francis rightly points out that the small acts each one of us does on a day to day basis can have an impact.  

There is a nobility in the duty to care for creation through little daily actions, and it is won derful how education can bring about real changes in lifestyle. Education in environmental responsibility can encourage ways of acting which directly and signifcantly affect the world around us, such as avoiding the use of plastic and paper, reducing water consumption, separating refuse, cooking only what can reasonably be consumed,
showing care for other living beings, using public transport or car-pooling, planting trees, turning off unnecessary lights, or any number of other practices. All of these reflect a generous and worthy creativity which brings out the best in human beings. Reusing something instead of immediately discarding it, when one for the right reasons, can be an act of love which expresses our own dignity.  - Pope Francis, Laudato Si': On the Care of Our Common Home - paragraph 211Small actions lead to big changes

I am sure you are doing some of these.  Are there other day to day activities that you do that helps to reduce your impact on our common home?