Forbes contributors publish independent expert analyses and insights. I write about green energy tech that will change your life. Have you ever noticed power lines sagging lower on a hot summer day?

On a cloudy day in mid-July, a crew of technicians carried a shiny metal orb, about the size and weight of a kid’s bowling ball, under a 110-kilovolt transmission line running near Hamburg, Germany.

Irish electricity prices are too high, writes Justin Moran of Wind Energy Ireland, and too much wind power is being wasted every year. A new technology – Dynamic Line Rating – could be deployed ...