From Seattle to Sweden, city and regional governments are using roof gardens, specially designed wetlands, and other forms of 'green infrastructure' to rein in pollution – and to save money.
The US Army of Corps of Engineers has opened the Morganza spillway to prevent the surging Mississippi from endangering New Orleans. But farms and natural habitat will be flooded as a result.
Changing rainfall patterns have increased the number and severity of floods. Better forecasts and improved flood management have helped, but planners need to do more to reduce risks and boost community resilience.
Wednesday's agreement to tear down four Klamath River dams took years to reach. But it’s a costly project, and there may be more conflicts ahead.
Development, farm practices, and population growth have increased the risk of flooding.