"It can be fine here but we can be pulling people out at the other end of the job because it's foggy, and visibility is down to 20m," says Anthony Windle as he manhandles his pickup truck over the rough road winding across the wild moorland terrain. As if on cue, a few minutes later the ground turns white as the rain changes to snow. "You can get several degrees of frost at this end of the job but nothing at the other." The reason Windle can enjoy four seasons in one day is because his site is massive. It covers 22 square miles, which is about the size of Brighton, and will be Europe's largest onshore wind farm, Whitelee, when it is completed next year - big enough to power all the homes in nearby Glasgow. The sheer scale of the place presents project director Windle with a number of challenges, not least just getting around.
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