Water Use in Southwest Heads for a Day of ReckoningJim Wilson/The New York Times
The Southern Nevada Water Authority is tunneling under Lake Mead to install an intake valve that could continue operating until water levels dropped below 1,000 feet.
Dave Ames, a science teacher at Cohasset High School in Cohasset, Massachusetts built a large cube that represents the size of 1 ton of carbon dioxide. Take a look.
OK, yes. CO2 (carbon dioxide) is invisible. But it's still interesting to see how much space a ton of CO2 would take up if it were sitting in front of you.