Good job bringing this to light. People won't realise how huge the problem is and municipalities are woefully ill equipped to...
Agreed; mining can never be sustainable, but then how do you get the metals to make all the things you need in the course of...
Very good piece.
How do sperms find the ova? Solomon Snyder and his colleagues at the Johns Hopkins University in Baltimore, Maryland, say that the male sex cells virtually sniff out their female counterpart (New Scientist, Vol 145, No 1961).
The scientists found that rat sperms possess odour receptors, which are also present in the nasal cell lining.
Snyder believes that the receptors detect chemicals released by the ova and requisition the mitochondria -- the cell organelle that generates energy -- for the power to navigate the sperms towards the eggs.
The scientists claim that disabling the odour receptors could provide a means to develop a male contraceptive pill.