Why was it that technological advancements made in Africa were not enough to propel Africa's economy upwards?

Air pollution: “combustion results in gases such as nitrogen oxides, nitrogen dioxide and particulates. the main causes of air pollution include transport, domestic combustion and industrial processes. pollutants from these sources can cause problems in the immediate vicinity and a distance away.”

Don’t use up to much of them it leads to pollution

Examples are the following: 1. 1996: rash of church thefts include one to finance trips to cape cod.-on this day in 1996, a lutheran treasurer in cheshire, connecticut was accused of  stealing from his church to finance a lifestyle that included resort trips and vacation homes on cape cod and in vermont.2. the story in the new york  times began: -lutheran treasurer in connecticut accused of stealing from churcha former treasurer of the lutheran churches governing body in new england was arrested yesterday on charges that he embezzled $800,000 from the church to finance a life style that included resort trips and vacation homes on cape cod and in vermont.