"Economics dictates that 95% of current U.S. hydrogen is produced by steam-methane re-forming of non-renewable natural gas, " Michael K. Heiman, professor of environmental studies at Dickinson College, wrote in a study of the proposed hydrogen economy last year.

FORBES: Magazine Article

"They suck up a lot of dissolved nutrients, " said George Kraemer, professor of Biology and Environmental Studies at Purchase College.

WSJ: Connecticut Seaweed: Life Down on the Kelp Farm

"Certainly we come in contact with bacteria all the time, " Renee Godard, lead author of the study and professor of biology and environmental studies at Hollins University, a private liberal arts college in Roanoke, Virginia.

CNN: Soda fountains contained fecal bacteria, study found