A new U of T Scarborough study has identified "superstar" varieties of rice that can reduce fertilizer loss and cut down on environmental pollution in the process.The study, authored by U of T Scarborough Professor Herbert Kronzucker in collaboration with a team at the Chinese Academy of Sciences, looked at 19 varieties of rice to see which ones were more efficient at using nitrogen."We have this bucolic idea of agriculture — animals grazing or vast fields of majestic crops — but the global reality is it's one of the biggest drivers of environmental pollution and climate change," says Kronzucker.