Colloidal silver, a new water filter device
The everlasting problem of drinking water in the Kathmandu Valley (Nepal) will be less severe in the days to come, thanks to a local potter's technology, aided by an American's idea. Reid Harvey,an
The everlasting problem of drinking water in the Kathmandu Valley (Nepal) will be less severe in the days to come, thanks to a local potter's technology, aided by an American's idea. Reid Harvey,an