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Solar Trees May Light Up Europe

This is a great innovation — the streets of Europe could soon be lit by "solar trees". These self-contained streetlights could save cities energy and money too. Unlike regular streetlights, they do not require costly underground wiring to install, and they are immune to blackouts. Designed by Ross Lovegrove, the lights have 10 solar panels arrayed at the top of …

Optimal Green: Daylighting

Most modern buildings don’t take full advantage of daylight. Here, in the Plaza at PPL Center, a dramatic eight-story central glass atrium brings natural light deep into the core of the building, while extensive perimeter glazing provides abundant daylight.