The general concepts found in this section are: 1  The earth's atmosphere is a very thin layer wrapped around a very large planet. 2  Two gases make up the bulk of the earth's atmosphere: nitrogen (), which comprises 78% of the atmosphere, and oxygen (), which accounts for 21%.
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Lean Development is about Learning â¢ Learning fast how to make good products â¢ Success through the goal of knowledge-based, learning-based development 9 Ward, Sobeck; Lean Product and Process Development, Lean Enterprise Institute, 2014 Michigan Lean Consorti um 2016 Annual Conference The Fundamental Value-Creating Cycle