Outdoor sculptures are increasingly embracing algae-based plastics as a revolutionary material for sustainable art. These biodegradable polymers, derived from algae biomass, offer an eco-friendly alternative to traditional plastics, reducing environmental impact while maintaining durability. Artists and designers use algae-based plastics to create weather-resistant installations that decompose naturally over time, aligning with green urban initiatives. The material's versatility allows for intricate designs, vibrant colors, and even carbon sequestration benefits. From temporary exhibits to permanent public art, algae-based plastics are redefining how sculptures interact with nature, merging creativity with environmental responsibility. This innovation not only reduces plastic waste but also raises awareness about sustainable materials in art and design.