He had persuaded his science teacher to help him make a makeshift rocket. Somehow, he had managed to get his hands on the ingredients for gunpowder - potassium nitrate, sulphur and charcoal.
2. Barriers to Entry and Innovation
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However, critics in the nation have expressed concern that Google could now come in and monopolize the market. "If Naver and Kakao are weakened or pushed out and Google later raises prices, that becomes a monopoly. Then, even companies that rely on map services — logistics firms, for example — become dependent [on Google]," geography professor Choi Jin-mu told Reuters.
Promotion methods (Traffic sources)