How Climate Change Is Playing Havoc With Olive Oil (and Farmers) October 24, 2017 Carbon Dioxide Drought Environment +4 Global Warming IrrigationIFTTT Italy NYT. Climate Change Olive Oil Tuscany (Italy) Umbria (Italy) Carbon Dioxide Drought Environment Global Warming IrrigationIFTTT Italy NYT. Climate Change Olive Oil Tuscany (Italy) Umbria (Italy)