The EDF found that by 2030 and 2050, Iowa, the nation’s top corn producer, will see a boost in the number of days that have a temperature good enough for ... the world,” said Eileen McLellan ...

“If enough people would do it, it would make an impact,” she said. Rachel Zumbach, a spokesperson for the Iowa Corn Growers Association, said checkoff money is not used to further the ...