Hints and tips:
...light bulbs....
...The lower quota will tighten the market for rare earths, a group of 17 elements crucial for products from BlackBerry devices and iPhones to wind turbines and guided missiles....
...Its green portfolio includes a slew of diverse products ranging from high-speed trains to energy-efficient light bulbs and gas turbines....
...Some leaders ing lights of the green movement, long implacable foes of nuclear power, now say that the risks posed by global warming far outweigh those posed by radioactive waste....
International Edition