My daughter Sarah, 11, is reading: 25 Simple Things Kids Can Do To Save Energy (Earth Works Press). She read to me today that if every homeowner in the U.S. cut back their thermostat 6 degrees, we would save 570,000 barrels of oil a day. We’ve cut our heat back at home to 62 degrees, for Sarah’s generation’s sake. I recently told the Chronicle Telegram newspaper that I don’t want our children inheriting a world of global warming. Quip: How do “KEEP OFF THE GRASS” signs get there?