Your answer may vary. Depending on the resources and choices available to you, you may be able to carefully source products that you use, alter the way you personally impact your immediate environment, support regulatory efforts that protect larger parts of the environment, or have fewer/no children.
Work Step by Step
There are a multitude of ways most individuals reading this text are able to reduce their own ecological footprint, with some examples above. Not all options are available to all people, so consider your own individual circumstances and what is possible for you personally.