Waste is not waste

Organic waste is everywhere — food scraps, agricultural residues, fallen leaves, wood offcuts, coconut husks, rice straw, sugarcane bagasse, animal manure, sewage sludge. Most of it is buried, burned or left to decompose, releasing methane and other greenhouse gases in the process. Yet every one of these materials carries energy, nutrients and potential. The companies in this section are transforming the full spectrum of organic waste — from kitchen bin to farm field to forest floor — into biogas, compost, building materials, bio-based additives for plastics and cement, and regenerative inputs that give back to the soil and the climate what industrial systems have taken away.

Plastic was designed to last forever. The problem is, we use most of it once. What began as a miracle material has become one of the planet's most persistent pollutants — in our oceans, our soil, our food chain, and our bodies. But plastic is also a resource, and the most innovative companies in the world are proving that it can be recovered, repurposed and redesigned out of the waste stream entirely.

Our phones, laptops and household appliances contain gold, silver, copper, cobalt and rare earth elements — materials that took enormous energy and environmental cost to extract. When we throw them away, we throw all of that away too. E-waste is the fastest growing waste stream on earth, and it is also one of the richest. The solutions in this section are mining what we have already mined, and doing it cleanly.

Buildings go up. Buildings come down. And when they do, the rubble, concrete, steel and timber that remains accounts for some of the largest waste volumes on the planet. Yet almost all of it has a second life — as aggregate, as reclaimed material, as the foundation of something new. The companies in this section are proving that what we demolish today can become what we build tomorrow.

A billion tyres reach the end of their life every year. They cannot be landfilled easily, they burn toxic when incinerated, and they pile up in stockpiles that become environmental hazards. Yet rubber is a valuable material, and the most innovative companies in this space are finding ways to grind it, devulcanise it, pyrolyse it and return it to productive use — in roads, in sports surfaces, in new products entirely.