WHAT YOU CAN DO PERSONALLY TO CONTRIBUTE

Whatever we do to control our impacts on the environment, the first thing we need to do is measure those impacts. Unless we can measure, we cannot manage.
The way we use the planet's resources makes up our 'ecological footprint.' This tranlsates the impacts into the area of land that you would need to grow your food, provide your energy and to absorb the pollutants you create.

Keep a note of the amount of land you need.

You may have heard a more recent development called "carbon footprint", that measures your impacts as a weight or volume of carbon dioxide that you create - either directly or indrectly
Act On Carbon Calculator
Again keep a record as you may need this in future.