How Climate Change Threatens Food Security
Climate change is a contributory factor to the food price crisis, and its impact on agriculture and food security in developing countries is expected to get more serious. by Brett Harris from People and Planet Climate change is already affecting food security and it is expected to have even greater impacts in coming years. There are at least four channels by which climate change affects food security: Temperature increase. Higher temperatures lead to heat stress for plants, increasing sterility and lowering overall productivity. Higher temperatures also increase evaporation from plants and soils, increasing water requirements while lowering water availability. Changing patterns. In many places, growing seasons are changing, ecological niches are shifting, and rainfall is becoming more unpredictable and unreliable both in its timing and its volume. This is leading to greater uncertainty and heightened risks for farmers, and potentially eroding the value of traditional agricultural