Colder climates may see increases in crop yields from longer growing seasons and milder temperatures , but the negative effects are expected to outweigh the positive , the report states . It 's running out to rein in climate change , the report concludes . ` ` A certain amount of uncertainty '' is setting in , expert says . Without checks on emissions , the crisis will be irreversible , it states . Losses outweigh gains for farmers and the poor , it concludes .
It 's running out to rein in climate change , the report concludes . ` ` A certain amount of uncertainty '' is setting in , expert says . Without checks on emissions , the crisis will be irreversible , it states . Losses outweigh gains for farmers and the poor , it concludes .