On the roof of the O2 Arena, one of London’s largest indoor venues, there’s a small cluster of very peculiar wind turbines. They look nothing like the tall, imposing ones that are increasingly ...

O2 Telefónica has signed a new Power Purchase Agreement (PPA) to procure wind energy in Germany. Under the 15-year deal, renewable energy provider Iberdrola will supply 3,000 GWh of green power to the ...

London (CNN) — On the roof of the O2 Arena, one of London’s largest indoor venues, there’s a small cluster of very peculiar wind turbines. They look nothing like the tall, imposing ones that are ...