Elephant hunting in Kenya at least one member of "Kenya's royal family" (the Kenyatta) had shipped over six tons of ivory to China. In the 1970s, 1900 elephants were killed in Kenya for their ivory tusks, increasing to 8300 elephants in the 1980s. In 1989, as a dramatic gesture to persuade the world to halt the ivory trade, President Daniel arap Moi ignited twelve tons of elephant tusks. In the 1990s the widespread ban on commercial ivory trading reduced the industry to a fraction of what it had been and elephant populations have stabilised. But illegal poaching and sale on the black market still
LED lamp energy. Lighting consumes roughly 12% of electrical energy produced by industrialized countries. The increasing scarcity of energy resources, and the environmental costs of producing energy, particularly the discovery of global warming due to carbon emitted by the burning of fossil fuels, which are the largest source of energy for electric power generation, created an increased incentive to develop more energy-efficient electric lights. The first low-powered LEDs were developed in the early 1960s, and only produced light in the low, red frequencies of the spectrum. The first high-brightness blue LED was demonstrated by Shuji Nakamura of Nichia Corporation in 1994. The