What are outcomes? An outcome is literally what you hope will happen as a result of your work. If you want to share different ways that people can reduce their carbon footprint, then you may want people to 1) understand different ways to reduce their footprint, and 2) make different choices that are more environmentally friendly.
I find this framework that lays out different levels of outcomes, helpful:
In my example above, #1 is a change is knowledge, #2 is a change in behaviour.
I hope this helps! As always, please share your questions and helpful resources!