Lightning, forest fires and peat fires can start coal fires. But they are often caused by mining accidents and bad mining practises. In Indonesia, the same fires used to clear large tracts of rainforest ignited over 300 coal fires since the 1980s.
OVERACHIEVER Dictionary entry overview: What does overachiever mean? â¢ OVERACHIEVER (noun) The noun OVERACHIEVER has 1 sense: 1. a student who attains higher standards than the IQ indicated Familiarity information: OVERACHIEVER used as a noun is very rare.
By Mayo Clinic Staff. Hyperthyroidism (overactive thyroid) is a condition in which your thyroid gland produces too much of the hormone thyroxine. Hyperthyroidism can accelerate your body's metabolism significantly, causing sudden weight loss, a rapid or irregular heartbeat, sweating, and nervousness or irritability.