Rising Temperatures, Rising Seas

S1 E1: The toll of natural disasters in 2015 amounted to 20,000 lives lost and more than 42 billion dollars worth of damage. It was a record breaking year in several categories. It included tropical storms of unprecedented strength, interminable droughts, and the highest temperatures measured in the 130 years. Is this the result of global warming? Or could other factors, such as El Niño be to blame.