The Aztecs had a shining city on a lake, with canals, causeways and aqueducts – until the Spanish came. Mexico City is still suffering the consequences of their bad public health decisions.
Thousands of dams across the US are aging and overdue for maintenance. Taking them down can revive rivers, restore fish runs and create new opportunities for tourism and outdoor activities.
Over the next 50 years, the arid zone – containing the areas of true desert – is projected to expand well into the Murray-Darling Basin and almost entirely envelope the Lake Eyre Basin.
Dams built to hold enormous quantities of toxic mining waste have a long history of spills. Decisions in the Pacific Northwest threaten three free-flowing rivers there.
The ‘New Bradfield’ scheme seeks to revive a nation-building ethos supposedly stifled by bureaucratic inertia. But there are good reasons the scheme never became a reality.
Big storms with lots of flooding, like hurricanes Dorian and Maria, actually restore the Caribbean’s delicate balance between native and nonnative fish species, new research finds.
Executive Director and Professor of Fisheries and River Management, Gulbali Institute (Agriculture, Water and Environment), Charles Sturt University, Charles Sturt University