Thousands of satellites are due to burn up in the atmosphere every year – damaging the ozone layer and changing the climate
Operators follow a 25-year rule: at this point, a satellite’s mission is deemed to have ended and it is lowered into the atmosphere where gravity and friction kicks in. While this helps clear space, ...
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Red onion waste becomes powerful solar cell shield that blocks 99.9% of UV rays
Researchers found that nanocellulose films treated with red onion dye blocked 99.9% of UV radiation, outperforming commercial ...