1. What are the leaning things? Why is light beaming down from the tower?

2. Can you work out what they are now and what is happening?

3. Did you guess that this is a power plant? It consists of a pair of "concentrated solar power systems," which function in an unusual way. A mirror array on the ground consisting of 624 mirrors moves throughout the day, tracking the sun and focusing its beams onto the tip of a 160-meter-tall tower.

4. The focused light heats up a tank of water at the tip of the tower, which in turn powers the steam turbine of an electrical generator. This simple process can generate up to 20 megawatts of energy. PS 10 Solar thermal power station - http://www.solarthermalpower.it This began operation in the spring of 2007. When the entire complex is completed in the 2013, the plant will produce enough energy for 180,000 homes, equivalent to the needs of the city of Seville. The tower will prevent the emission of more than 600,000 metric tons of greenhouse gases each year.

5. Could this be adapted to be used by a home?

6. What do you notice about these buildings in Bahrain? Where is Bahrain?

7. This is the first commercial structure to have large wind turbines as a part of its design. The twin skyscrapers are curved to funnel the strong Gulf winds into the three turbines, which power up to 15 percent of the building's power.

8. This is a green building In New Caledonia, The Jean-Marie Tjibaou Cultural Center Find out what is special About it. How is it “Green”?