Not sure where he is getting his figures from about the scientists.
Check it out:

The rapidly changing climate poses a threat of sparking greater global conflict, U.S. Secretary of State John Kerry on Monday told the graduating class of Boston College, urging the graduates to play a role in pushing for new energy policies.

Citing recent reports from the United Nations and White House showing that a rising emissions of carbon dioxide from the burning of fossil fuels in contributing to a warming world, he warned of the possibility of climate-related conflict.

“Ninety-seven percent of the world’s scientists tell us this is urgent. Why? Because if crops can’t grow, there will be food insecurity. If there are stronger more powerful storms, things will change in a hurry,” Kerry said at Boston College, where he received his law degree in 1976.