Environmental radioactivity g) to that of the soil water (Bq ml). If the radioactivity is tightly bonded to by the minerals in the soil then less radioactivity can be absorbed by crops and grass growing in the soil. One dramatic source of man-made radioactivity is a nuclear weapons test. The glassy trinitite formed by the first atom bomb contains radioisotopes formed by neutron activation and nuclear fission. In addition some natural radioisotopes are present. A recent paper reports the levels of long-lived radioisotopes in the trinitite. The trinitite was formed from feldspar and quartz which were melted by the heat. Two samples
Wat Si Saket Wat Si Saket Wat Si Saket is a Buddhist wat in Vientiane, Laos. It is situated on Lan Xang Road, on the corner with Setthathirat Road, to the northwest of Haw Phra Kaew, which formerly held the Emerald Buddha. Wat Si Saket was built in 1818 on the order of King Anouvong (Sethathirath V.) "Si" is derived from the Sanskrit title of veneration Sri, prefixed to the name of Wat Saket in Bangkok, which was renamed by Anouvong's contemporary, King Rama I. Wat Si Saket was built in the Siamese style of Buddhist architecture, with a surrounding terrace and an