Which innovative product design strategy did WWF pioneer in 2008 that revolutionized conservation merchandise?

The World Wildlife Fund (WWF) is known globally for its iconic panda logo and conservation efforts. But behind the scenes, the organization has implemented innovative product strategies to raise awareness and funding. This poll tests your knowledge about a groundbreaking product design initiative that helped transform wildlife conservation marketing.

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The WWF 'Extinct Collection' - clothing items that gradually faded with each wash to represent endangered species disappearing
The 'Last Edition' campaign - limited-edition products where sales decreased as animal populations declined
The 'Earth Hour' branded LED products that allowed consumers to participate in the global movement year-round
The 'Origami Wildlife' line featuring packaging that transformed into paper models of endangered animals