Serious question for a friend?
Where can you buy an Australian kangaroo in Germany and how much would such a fully grown kangaroo cost?
Sand is becoming scarce?
It's about the global construction industry and sand as an aggregate for concrete. The question is directed at building materials specialists. It's hard to believe, but the sand needed to mix concrete is becoming scarce worldwide. Humanity mixes 7 billion tons of concrete every year, which, of course, requires sand. A natural resource that is…