Challenge
To design a tool that calculates the environmental benefits of a specific product compared to an industry standard.

Solution
Hand-held calculator wheels. One of these wheels calculates the reduction in environmental impacts of hemp garments compared to conventionally grown cotton (arguably the most environmentally damaging crop in the world). The other calculates the reduction in landfill for compostable produce trays compared to conventional PET plastic produce trays.

The reverse side of these calculators drives the point home with comprehensible statistics that help get your head around the cumulative total impacts your purchasing decisions have on the environment.