Turning walks into watts

The average human being generates about eight watts of energy with each step, most of which is expended as vibration. It may not sound like much, but take the 30,000 or more people who pass through a major-city subway hub at rush hour, and suddenly you’ve got serious power. That’s usually a problem for architects and engineers, who have to […]

Read more

Rising Demand for Meat

Appetite for meat is growing as the developing world becomes more prosperous. But meat—especially beef-can be polarizing, on health, environmental, and ethical grounds. Chicken outpaced beef in the U.S. in 2010. Total U.S. meat consumption peaked in the mid-2000’s and has declined ever since. Argentina’s famous appetite for beef has fallen because of cholesterol consciousness and economic downturns. In countries […]

Read more

Better Water Use Can Cut Global Food Gap

Although growing human numbers, climate change and other crises threaten the world‘s ability to feed itself, researchers believe that if we used water more sensibly that would go a long way towards closing the global food gap. Politicians and experts have simply underestimated what better water use can do to save millions of people from starvation, they say. For the […]

Read more
1 138 139 140 141 142 455