As another metric of a country’s emphasis on biodiversity conservation, we included two different composite rankings of environmental ‘performance’: an absolute environmental ranking
(not accounting for resource availability), and a proportional ranking (i.e., relative to existing natural resource availability) (Bradshaw et al., 2010). The composite rankings are based on natural forest loss, habitat conversion, marine-species captures, fertilizer
use, water pollution, carbon emissions and number of threatened species (Bradshaw et al., 2010).