It was there that he started a Permaculture landscape design and build company focusing on rainwater harvesting , greywater systems , and desert agriculture .
Millison first began studying Permaculture at Prescott College in Arizona .
It was there that Millison started a Permaculture landscape design and build company focusing on rainwater harvesting , greywater systems , and desert agriculture .
Millison first began studying Permaculture at Prescott College in Arizona .