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Cities like Melbourne are a store for such huge amounts of resources that they could be used as urban mines. Donaldytong (own work)/Wikimedia

With the right tools, we can mine cities

With an ever-increasing cost to extract dwindling raw materials, it's time to look at cities as urban mines. We're developing the tools to do that.
Who will emerge as the leader on climate change following the U.S. withdrawal from the Paris agreement? (AP Photo/Evan Vucci)

Canada has the opportunity to be a climate leader in Bonn

Canada ratified the Paris agreement on climate change, but it hasn't yet filled the leadership void left by the United States. Time is running out.
Methane is produced in landfill when organic waste decomposes. Shutterstock

Capturing the true wealth of Australia’s waste

Landfills produce huge amounts of methane. Many of the bigger operators capture it to turn into energy, but they’re wasting about 80% of what’s available. It’s time Australia stepped up.

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