Optically controlled metasurfaces for dynamic dual-mode modulation

Dynamic control of terahertz (THz) waves at will with an ultra-compact device is important for THz technologies in biomedical imaging, telecommunications, detection, and beyond. However, tunable THz devices made of conventional ...

River deltas: Valuable and under threat

The livelihoods of millions of people who live in river deltas, among the world's most productive lands, are at risk. Created where large rivers meet the ocean and deposit their natural sediment load, river deltas are often ...

Renewables help offset rise in coal emissions, IEA says

A jump in renewables and efficiency efforts helped blunt a feared runaway in carbon emissions growth from a surge in coal use last year due to the global energy crisis, the IEA said Thursday, even if CO2 emissions hit a new ...

2022 summer, a dry wake-up call

The 2022 summer has shown us again how climate is becoming more extreme year by year. Sticking to business-as-usual and counting on adaptation alone will not work. Only a rapid phase out of fossil fuels will prevent the worst, ...

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