Construction and demolition waste (CDW) account for
over 30% of global waste,
Amounting to 6 billion tons of CDW every year,
most of which end up in landfills.
90% of drywall end up in landfills.
80% are gypsum boards containing sulfur.
This sulfur becomes toxic gas, leading to acid rain
leach into local water streams, posing public health hazards