What was the impact of DDT?
Evidence?
Anyone who disturbs the ground in Alberta has to have a level 2 ground disturbance certificate except farmers,thats the law.
If you like I can scan all my piles of Albertas acts and regulations,or you can ask anyone with a GD ticket.
Its common knowledge to anyone in Alberta who moves the earth.
Because farmers dont need permits they arent monitored as heavy for non compliance.