mercredi 1 juillet 2015

Are there any substances, materials we should be putting back?

I was throwing out some crumbs from salty snacks and wondered if I should somehow be returning this mineral to the environment. A quick Google told me, no, oceans and so forth are getting salter.
My question now is: are there other substances we should be putting back?
I'm not talking about composting, which I do and think anyone who can, should, or recycling likewise, but any, say, inorganic substance.
Thanks in advance!
There, finally started a thread (I hope). It took long enough to get up the nerve (and the boredom of my second week off work with a broken shoulder!)


via International Skeptics Forum http://ift.tt/1KtNF04

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