Berry introduced the prince as "our worthy neighbor" and someone who has nearly been alone among world leaders in speaking out about how, just by food choices, industrial economies are "running up a huge ecological debt."
The audience gave Berry a cheering standing ovation. And the prince said Berry "has long been a hero of mine."
Prince Charles plugged an idea called "true-cost accounting" as a solution, where all the costs associated with business activity must be tallied, such as pollution and soil depletion.
He said change can only come with new financial incentives and disincentives.
"We must see we are part of the natural order, not isolated from it," he said.
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