The Optimist Daily has reported on a number of inventions that use ultraviolet (UV) microorganisms' radiation as a sanitation tool, like this door handle or this mask decontamination machine. It seems lighting may be the future solution to quickly and safely zap away harmful … [Read more...] about Simple UV-LED lights could be used to kill coronavirus and HIV
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How much energy? Your home energy questions answered
Every day we have a choice in which appliance to use. The kettle or the stove? A bath or a shower? Most of the time it's convenience and habit that automatically choose between our options. However, it may be useful to pause for a second and consider which is more efficient in … [Read more...] about How much energy? Your home energy questions answered
Pittsburgh will become a dark sky city in 2022
Anyone who lives in a big city knows that stars are a rare sight due to light pollution, but that may soon change in one American metropolis. Pittsburgh, Pennsylvania has announced that it will become a dark sky city in 2022, joining others like Tucson and Sedona in Arizona, and … [Read more...] about Pittsburgh will become a dark sky city in 2022
Solar Sister empowers women in Africa to sell clean, solar technologies
Distributing solar-powered lights and phone chargers where they are needed the most, while giving low-income women the opportunity to earn supplementary income—such is the vision behind Solar Sister, a social enterprise with a presence in Tanzania, Uganda and Nigeria. With 1,500 … [Read more...] about Solar Sister empowers women in Africa to sell clean, solar technologies