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Because there are lots of climates and many of them require constant watering to have a green lawn? Sprinkling systems are a huge business.

• randomdata 8y ago
  Sure. The grass certainly turns brown around here. But that is just a water conservation state for the grass. It doesn't mean it is dead. As soon as it does rain again, it will turn green again. That is not a reason to water a lawn. A brown lawn functions equally well as a green one. In fact better as you don't have the same need to cut it.
  • CalRobert 8y ago
    The primary function of the lawn is decoration, though, and most people seem to prefer green grass.
  • bearforcenine 8y ago
    I imagine there are climates that are better for grass or certain species of grass that are very drought tolerant. However, in my experience, not watering a lawn will kill it. I have a few patches in my lawn that were killed this summer by lack of water due to a poorly designed sprinkler system.