Trees cool neighborhoods and clean the air, but planting drives often fail because nobody maintains the saplings after the photo is taken. The hard part is sustained care, not the planting day.

Create a solution that encourages people to plant and maintain more trees in their communities. Study who is affected, dig past the obvious symptoms to the real root causes, and design a solution that could actually work in the real world. There is no single correct answer — what matters is the quality of your thinking, the stakeholders you consider, and how clearly you justify your chosen direction.

• Who is most affected by this problem, and how did you account for them?
• What is the single biggest risk to your solution working?
• Which assumption, if wrong, would break your whole idea?