While natural climate variability is the most likely chief cause of the current drought, Dr. Manabe said, the global warming trend is probably «aggravating the current dry condition.» (nytimes.com)
Two chief causes for its rise are the stress suffered by babies being regularly separated from their mothers, and the common difficulties babies have tolerating the large cow's milk proteins in infant formulas and breastfeeding mothers» diets. (babyreference.com)
Would also eliminate the third world's chief cause of deforestation — the need for firewood. (jeffrubinssmallerworld.com)