1. This entry is done by the primary school. It presumably portrays The Great Barrier Reef but alongside that they have picked up on the very topical issue of plastic waste in our seas. I would imagine that many different year groups were involved in making this. There are fish drawings and some great little painted stones at the bottom.
2. Organ transplants are definitely the subject here. Alongside the scarecrow there are laminated pages of information on transplantation. I don't know if this is a subject close to the creator's heart for personal reasons. (Excuse the pun).
3. I apologise for the quality of my photo. This one's message is clear to see. Save the rainforest.