How much water do we use for irrigation?

While we know that we use more water for irrigation than for any other single purpose, watering practices are not monitored worldwide. Water needed for agriculture is expected to further increase as time goes on, so managing this precious resource as effectively as possible is imperative. Scientists have now shown that a nifty way of using information from satellites could pave the way to measuring how much water we use to irrigate, which could subsequently lead to better management.