precipitation is a source of water in an environment0 & farming is when a human plants crops for food ->  farming is when a human plants a large amount of crops  crops are a kind of edible plant for eating & plants require water for survival / to grow ->  crops require water to grow  farming is when a human plants a large amount of crops & crops require water to grow ->  farming requires a large amount of water  a farm is a kind of environment & farming happens on a farm ->  farming happens in an environment  farming requires a large amount of water & farming happens in an environment ->  farming requires an environment with a large amount of water  decreasing something that is required for a process has a negative impact on that process & farming is a kind of process ->  decreasing something that is required for farming has a negative impact on farming  farming requires an environment with a large amount of water & decreasing something that is required for farming has a negative impact on farming ->  decreasing the available water in an environment has a negative impact on farming in that environment  precipitation is a source of water in an environment & drought is when amount of precipitation decreases ->  drought is when available water decreases in an environment  decreasing the available water in an environment has a negative impact on farming in that environment & drought is when available water decreases in an environment -> droughts have a negative impact on farming