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Does your face mask have vents or valves?The Centers for Disease Control and Prevention (CDC) recently updated its guidelines advising Americans to avoid such face masks, as they aren’t as effective in preventing the spread of COVID-19.CLICK HERE FOR COMPLETE CORONAVIRUS COVERAGE“The purpose of masks is to keep respiratory droplets from reaching others to aid…

If you started with R100 and lost R50, what return do you need to get back to R100? Misunderstanding gains and losses can lead to bad decision-making, says Joao Frasco.Remaining invested is usually a good idea. If you lose 50% of your money, what return will you need to subsequently make, to get back up to your original…

By Adam Vaughan Rock dust could help absorb more carbonDr Dimitar Epihov Spreading rock dust on cropland around the world could save around a tenth of humanity’s “carbon budget”, the amount of carbon dioxide we can afford to emit without triggering catastrophic levels of global warming. Earth’s three biggest CO2 emitters – China, the US…

Christopher Weber, Associated Press Updated 4:45 pm PDT, Sunday, July 5, 2020 People visit Ocean Beach during the coronavirus outbreak in San Francisco, Sunday, July 5, 2020. Californians mostly heeded warnings to stay away from beaches and other public spaces during the long weekend as state officials urged social distancing amid a spike in coronavirus infections…

We are already seeing the pandemic's effects on mental health, and we need to act urgently to avoid a full-blown crisis, says Sam Howells   Health | Comment 29 April 2020 By Sam Howells Josie Ford Because of the coronavirus pandemic, many people cannot leave their homes except to buy food or exercise briefly. They…