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"Digitization may bring back ancient works in digital form, which is a more realistic and feasible solution," he said.

"Everyone feels like we don't have a problem, and the reason they feel that way is they have their heads in the sand," said Oregon psychologist Wilson Kenney, who has developed student intervention programs.

"Either people are careless about it and hurt people's feelings, or they are overly cautious and patronizing," he added. "So I think the only way to get into that sensible middle ground between the two is to talk about it openly, about my experiences, about my thoughts and also to give people a break – people who always think they are on the edge of being culturally or racially insensitive – to kind of get on their side a little and show them they don't have to worry so much. So that's the line I am trying to tread."

"Even in the absence of American leadership; even as this administration joins a small handful of nations that reject the future; I'm confident that our states, cities, and businesses will step up and do even more to lead the way, and help protect for future generations the one planet we've got," Obama said in a statement.

"Farming is one of the most rewarding careers I could think of. It's challenging and rewarding all the same," said Brad.