@loud36
The Lego Group manufactures ~36B bricks per annum —that’s roughly 4.5 per human— and has been producing modern bricks for the last 60 years.
Conversely, I can’t imagine that any family just throws away their Legos once the kids have outgrown them. They’ll either hoard them in a dusty attic or pass them onto an extended family child.
So how come we are not drowning in a Legocalypse of colored bricks?