It uses 15 to 50 litres per tree per day. That looks little, but it means that one hectare of grapes with 2,500 plants uses 37,500 litres of water each day. (one acre with 1,000 plants uses 3,750 gallons each day). If water was priced at its costprice, growers could not produce crops with drip irrigation;

50% Of the given quantity of water through drip irrigation evaporates;

In nature dry soil is white. That is not a coincidence, it cools the soil. However, the water from drip irrigation makes the soil black, so it heats up terribly;

The black color creates ideal circumstances for root diseases like phytophtora, pythium and fusarium = high mortality;

The diseases require treatments with pesticides, so drip irrigation leads to unhealthy food; and the pesticides are expensive to use;

It also causes salination of the soil – slowly the salt level rises, until the soil is too salty for trees/plants to grow; fertile soil is slowly being destroyed;

Trees then die all and have to be replaced, sometimes including the soil; or growers leave the area, e.g. the Central Valley along Highway 5 between San Francisco and Los Angeles;

Cities have incredibly high costs of investment of the expensive grid structure, eternal pumps use, maintenance and replacement of expensive tubes;