Hot and salty water is a common by-product of industries such as textiles, food and dairy production. But new technology that allows this water to be purified, collected and re-used on site has been developed by Victorian scientists.
Their compact module, smaller than the size of a human, can transform a wasteful industrial operation into an efficient process that recycles energy, water and materials.
“We’ve calculated that our module can reduce water use by more than 90 per cent in some industrial settings,” Professor Mikel Duke says.
It’s much better to give new glasses than recycled glasses if you want to help one of the 640 million people who are vision-impaired or blind simply for the lack of an eye examination and appropriate glasses.
This is according to a new international study led by Australian researchers.
Dr David Wilson, research manager in the Asia-Pacific for International Centre for Eyecare Education and head author of a major paper on the topic, says although you might feel good sending your old reading glasses to a developing country, it is far better to give $10 for an eye examination and a new pair of glasses—and that’s more likely to strengthen the ability of these communities to help themselves. Continue reading Donating used eyeglasses is a poor use of resources→