Hobsonville residents banded together for a clean up drive over the weekend, frustrated over construction waste dumping which resulted in streets and parks being littered with pieces of concrete and polystyrene, Stuff reports. Upper Harbour Local Board spends over $50,000 to employ a staff member to advise builders to tidy up their waste, and claim there’s been some improvement. However, Auckland Council identifies construction and demolition as the biggest sources of waste in the region, with 40% going to landfill.