Green Roof Challenge Urban Sustainability Social Post

Explore green roof challenge urban sustainability social post that encourages city dwellers to transform unused rooftops into thriving green spaces. The visual features a split composition showing a bare rooftop on the left transforming into a lush garden on the right, with the exact headline GREEN ROOF CHALLENGE and a clear call-to-action for participation. Include details about contest rules and submission deadlines. Color atmosphere: Fresh green, sky blue, warm terracotta, and clean white. Styling approach: Use bright, aspirational photography with clear before-and-after contrast and encouraging messaging. Design a scroll-stopping social visual with an immediate message hierarchy, platform-ready polish, clear subject separation, and space for concise copy. Keep the headline and event details exact and readable at thumbnail size; avoid platform chrome, engagement counters, and overcrowding.