Another way of looking at slope of a line is looking at it as an equation. We talked about what it meant for rise over run before. So what we will talk about how is that slope m equals the change in y ...

Copenhagen, with a waterfront already famous for bike lanes, pedestrian walkways, and offshore wind turbines, is adding another clean energy feature to its urban landscape: a ski resort. Perhaps the ...

An imaginative design for an energy plant topped with a ski-slope roof -- just named one of the "50 Best Inventions" of 2011 by Time magazine in November -- has faced a major speed bump. The ...