Max held the rudder steady, and the sail had a constant bellyful of wind, but as the hours passed the city grew smaller.

NEWYORKER: Max at Sea

Not everyone is convinced that wind-power is the most reliant route to clean, renewable carbon-free energy, and it is concerning that Britain is relying on a power source that must be backed up by more constant technologies such as nuclear, coal, or gas, because the wind blows inconsistently, as is its nature.

FORBES: Wind Power Efforts May Not Be Enough For U.K.