Oluf and Debra Johnson (plaintiffs) owned organic fields next to conventional (i.e., non-organic) fields. Paynesville Farmers Union Cooperative Oil Co. (Cooperative) (defendant) sprayed pesticides onto the adjacent fields and wind allegedly caused some of the pesticides to drift onto the Johnsons’ fields. As a result of this, the Johnsons stopped selling their soybeans and alfalfa as organic for three years. The Johnsons brought suit for trespass and nuisance, among other things. The district court granted the Cooperative summary judgment and dismissed the Johnsons’ claims. The court of appeals reversed. The Cooperative appealed.