What have you learnt about looking after the environment? Are you becoming an expert about some environmental issues?
You might have enough expertise to help other people. You might only need to learn a little more.
One way to help people is to do an audit. An audit could be as simple as showing people how to prevent pollution being washed into stormwater drains so less pollution enters the sea. You might be an expert at walking dogs so they don’t chase wildlife and you can show how to pick up dog droppings.