 The Economist (@TheEconomist)12/01/02 16:24 Scientists have invented a way of concentrating the energy in the sun’s rays without the need for mirrors econ.st/syf7cD |
| The Economist (@TheEconomist) 12/01/02 16:24 Scientists have invented a way of concentrating the energy in the sun’s rays without the need for mirrors econ.st/syf7cD |