Bill And Melinda Gates Foundation Grants $1.5M To Turn Human Waste Into Biofuel

<img src=''> Two of many challenges developing countries face are unsafe water and a lack of affordable energy. With the help

In San Antonio, Greenhouse Gases From Sewage Are Saved And Sold As Energy

<img src="" width="280" height="202" class="alignright size-full wp-image-234638" /></img> This week, a new biogas facility opened