If you are looking for ideas to take action for our planet, the World Wildlife Fund has resources and activities for families and teens.
https://www.wwf.org.uk/get-involved/kids-planet
The WWF youth engagement team work with young people between 11-18 years. Their programme empowers young people, helping them to inspire and encourage others. There are opportunities from community events to accessing our youth engagement toolkit.
And their youth ambassadors meet regularly. They help shape our youth programmes and campaigns, putting young people at the centre of WWF.
https://www.wwf.org.uk/get-involved/youth-engagement/ambassadors