Balkan Beat Box band performs on Earth Hour event in tel Aviv on April 23, 2009. The Tel Aviv municipality urged residents and business owners to turn off their electricity from 8-9 P.M. on Thursday evening, as part of a worldwide off-the-grid campaign against global warming and energy waste. An unplugged concert was held in Rabin Square. All energy supplied to the stage and minimal lighting required for safety came from renewed and alternative energy sources. A cycling site that produces energy from cyclists riding on the spot produced the energy for the concert. Photo by Gili Yaari / Flash 90.

Balkan Beat Box band performs on Earth Hour event in tel Aviv on April 23, 2009. The Tel Aviv municipality urged residents and business owners to turn off their electricity from 8-9 P.M. on Thursday evening, as part of a worldwide off-the-grid campaign against global warming and energy waste. An unplugged concert was held in Rabin Square. All energy supplied to the stage and minimal lighting required for safety came from renewed and alternative energy sources. A cycling site that produces energy from cyclists riding on the spot produced the energy for the concert. Photo by Gili Yaari / Flash 90.

Cyclists are riding special devices that generate alternative energy on Earth Hour event in Rabin Square, Tel Aviv. The Tel Aviv municipality urged residents and business owners to turn off their electricity from 8-9 P.M. on Thursday evening, as part of a worldwide off-the-grid campaign against global warming and energy waste. An unplugged concert was held in Rabin Square. All energy supplied to the stage and minimal lighting required for safety came from renewed and alternative energy sources. A cycling site that produces energy from cyclists riding on the spot produced the energy for the concert. Photo by Gili Yaari / Flash 90.

Cyclists are riding special devices that generate alternative energy on Earth Hour event in Rabin Square, Tel Aviv. The Tel Aviv municipality urged residents and business owners to turn off their electricity from 8-9 P.M. on Thursday evening, as part of a worldwide off-the-grid campaign against global warming and energy waste. An unplugged concert was held in Rabin Square. All energy supplied to the stage and minimal lighting required for safety came from renewed and alternative energy sources. A cycling site that produces energy from cyclists riding on the spot produced the energy for the concert. Photo by Gili Yaari / Flash 90.

Young Israelis are attending Balkan Beat Box band concert on Earth Hour event in tel Aviv on April 23, 2009. The Tel Aviv municipality urged residents and business owners to turn off their electricity from 8-9 P.M. on Thursday evening, as part of a worldwide off-the-grid campaign against global warming and energy waste. An unplugged concert was held in Rabin Square. All energy supplied to the stage and minimal lighting required for safety came from renewed and alternative energy sources. A cycling site that produces energy from cyclists riding on the spot produced the energy for the concert. Photo by Gili Yaari / Flash 90.

Ibn Gvirol st., one of Tel Aviv's main streets, is crowded by people attending the Earth Hour event on Rabin Square on April 23, 2009. The Tel Aviv municipality urged residents and business owners to turn off their electricity from 8-9 P.M. on Thursday evening, as part of a worldwide off-the-grid campaign against global warming and energy waste. An unplugged concert was held in Rabin Square. All energy supplied to the stage and minimal lighting required for safety came from renewed and alternative energy sources. A cycling site that produces energy from cyclists riding on the spot produced the energy for the concert. Photo by Gili Yaari / Flash 90.

A fresh fruit juice stand in Ibn Gvirol st. Tel Aviv on April 23, 2009. Photo by Gili Yaari / Flash 90.