Add Yahoo as a preferred source to see more of our stories on Google. PARK CITY, Utah — It started with a birthday invitation. In the summer of 2015, filmmaker Sam Green, who’d just finished a ...

There are many different principles on which to draw in moral reasoning about specific environmental problems. This lesson reviews three basic pairs of principles: justice and sustainability; ...

Lipids function as essential structural components of membranes, as signalling molecules, as chemical identifiers of specific membranes and as energy storage molecules. The synthesis of lipids is ...