Most of the crops consumed around the world are produced by rain fed-agriculture, according to the International Water Management Institute, a nonprofit science research organization.
About 60 percent of farmed land in South Asia and 95 percent in sub-Saharan Africa is rain dependent.
If the world meets the goals set out in the 2016 Paris Agreement to keep the global temperature rise to under 2 degrees Celsius, these regions will have 20 to 30 years to prepare and adapt farming practices.