Imagine a world where clean air and water came with a price tag.

Some conservationists and economists argue that putting a price on nature is the only way we can safeguard environmental resources. As the human population swells, securing food, shelter and energy is coming at an enormous cost to biodiversity and natural ecosystems.

But is placing a dollar value on the environment the best way to ensure conservation? Should the natural world be valued for its own sake, regardless of the services it provides us?

Join the IQ2 debate with scientist Tim Flannery, economist Richard Dennis, Aboriginal philosopher Mary Graham, Co-Deputy Leader of the Australian Greens Larissa Waters, conservationist Penelope Figgis and agricultural investor Cullen Gunn.