Every second of every day, wildlife — and a grisly assortment of wildlife “parts” — are illegally crisscrossing the globe to feed demand in both developed and developing countries from China and Vietnam to the United States and beyond. To combat this issue, the environmental organization WildAid takes a decidedly different tack than most conservation-minded NGOs. Rather than focus on protecting wildlife in parks and preserves — the “supply” side of the illegal wildlife trade — the organization tackles consumer demand head-on through slick ad campaigns featuring some of the world’s most iconic names and faces repeating the organization’s mantra: “When the buying stops, the killing can, too.” The good news is that the approach seems to be working. Ensia recently caught up with WildAid co-founder Peter Knights at the Fortune Brainstorm Green conference in California.