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1. **Recycling Solar Panels:**
– Australian researchers at the University of Newcastle have developed a simple, eco-friendly way to extract silver from end-of-life solar panels without harmful chemicals.
– The method involves grinding solar panels into fine powder and floating them in water, where silver rises to the surface and waste sinks.
– This low-tech approach recovers more than 97% of silver quickly.
– This technique could be adapted to recover other valuable metals from waste.
– Simultaneously, a Chinese company, Longi Green Energy Technology, plans to mass-produce solar cells without silver, using base metals instead, potentially reducing solar costs further.
2. **Exercise and Depression:**
– A new review from the University of Lancashire indicates exercise can be as effective as antidepressants in reducing depression symptoms.
– Moderate intensity exercise beats vigorous exercise, and combining cardio with resistance training works better than aerobic alone.
– The review analyzed 73 studies with nearly 5,000 adults.
– Researchers caution that some exercise types weren’t studied and long-term benefits are still unclear.
– Larger, higher-quality studies are needed to better understand which exercises work best and for whom.
3. **UK Junk Food Advertising Restrictions:**
– New UK rules restrict junk food adverts to after 9pm on TV and ban them online to help fight childhood obesity.
– One in eight children aged 2-10 in England are obese.
– The ban targets adverts for products like sweets, pizza, and ice cream but doesn’t apply to brand adverts.
– Experts emphasize the need for strong enforcement and closing loopholes to make these restrictions effective.
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