In healthy adults, the half-life of caffeine is 4.9 hours. In pregnant women, the half- life is 9-11 hours. In infants as well as young kids, the half-life of caffeine is longer than the adults, about 30 hours. Patients with severe liver disease, caffeine may accumulate in the liver with the half-life up to about 96 hours.
Much of North Koreaâs aviation fuel appears to come from China. In 2015, the isolated country spent $877,048 importing 1,415 tonnes of Chinese jet fuel, according to Chinese customs data - enough for North Korea to operate its fleet of largely Soviet-era military aircraft.
Used Nuclear Fuel and High-Level Radioactive Waste. A typical nuclear power plant in a year generates 20 metric tons of used nuclear fuel. The nuclear industry generates a total of about 2,000 - 2,300 metric tons of used fuel per year. Over the past four decades, the entire industry has produced 76,430 metric tons of used nuclear fuel.