Stop burning carbon immediately and mass starvation, migration and sickness will ensue

To quote from a 2009 speech of U.N. General Secretary Kofi Annan:

“Mass starvation, mass migration, and mass sickness will ensue if the world does not agree to the most ambitious international agreement ever negotiated on global warming.” 

Is from a comment on Bret Stephens debut New York Op Ed 'The Climate of Complete Certainty' which I put forth as an example of misplaced certainty on global warming.  If humanity were to take Kofi's call for action and stop the burning of carbon immediately then its mass starvation, migration and sickness that would ensue!