Consider costs of relevant non-conservation alternatives.

For strate­gies that depend upon con­vinc­ing oth­ers to invest in con­ser­va­tion rather than a tra­di­tion­al, non-con­ser­va­tion alter­na­tive, it may be use­ful to cal­cu­late ROI for com­pet­ing, non-con­ser­va­tion alter­na­tives (e.g. grey infra­struc­ture vs nat­ur­al infra­struc­ture). Maps that iden­ti­fy where the con­ser­va­tion strat­e­gy is the eco­nom­i­cal­ly pre­ferred alter­na­tive can be very influential.