At any given time, 1,100 tons of microplastic are floating over the western U.S. New modelling shows the surprising sources of the nefarious pollutant.
Scientists in California just ran the numbers on what would happen if their state slapped solar panels on 4,000 miles of its canals, including the major California Aqueduct, and the results point to a potentially beautiful partnership.
Facilities that suck carbon dioxide out of the air could be powerful weapons for fighting climate change. But their deployment requires a huge, wartime-style investment.
When humans over-exploit underground water supplies, the ground collapses like a huge empty water bottle. It's called subsidence, and it could affect 1.6 billion people by 2040.
Conflict forced scientists to abandon a gene bank, but not before duplicating their last remnants of essential crops in the Svalbard vault on a remote Arctic island.
