SEATTLE - Microsoft co-founder and philanthropist Bill Gates warned that there will be dire consequences if the world does not achieve zero net carbon emissions by the year 2050.In his new book, "How to Avoid a Climate Disaster," Gates says that it is imperative that the world go from the current 51 billion tons of emissions to zero within the next 30 years to avoid catastrophe."The migration that we saw out of Syria for their civil war, which was somewhat weather dependent, we’re going to have 10 times as much migration because the equatorial areas will become unlivable," Gates told "Fox News Sunday" host Chris Wallace, warning what will happen if the goal is not reached. "We won't be able to farm or go outside during the summer..