The Straight Dope: If blood is red why do your veins look blue?
Blood is a dark red when it doesn't have oxygen, not blue. They look blue because the veins are below the skin and it appears blue when the light goes through the skin.
Wednesday, July 31, 2013
Sunday, July 21, 2013
Eco-Concrete: These Sidewalks Eat Urban Smog
Eco-Concrete: These Sidewalks Eat Urban Smog
Dutch scientists say their revolutionary concrete can cut urban air pollution by 45 percent.
Dutch scientists say their revolutionary concrete can cut urban air pollution by 45 percent.
Bye-Bye, Blacktop—Why White Streets Will Chill Our Sweltering Cities
Bye-Bye, Blacktop—Why White Streets Will Chill Our Sweltering Cities
Researchers in California have engineered a reflective coating that, when applied to blacktop, can lower the surface temperature of a city boulevard or a parking lot by a whopping 40 degrees Fahrenheit on a sweltering summer day.
Researchers in California have engineered a reflective coating that, when applied to blacktop, can lower the surface temperature of a city boulevard or a parking lot by a whopping 40 degrees Fahrenheit on a sweltering summer day.
Op-Ed: White Roofs Are the White Knight We Need to Slay Climate Change
Op-Ed: White Roofs Are the White Knight We Need to Slay Climate Change
White roof project puts a specially scientific tested coating on the roof to repel the heat. The temperature inside can be lowered 35 degrees in the summer!
White roof project puts a specially scientific tested coating on the roof to repel the heat. The temperature inside can be lowered 35 degrees in the summer!