Reality scarcity

Freshwaters are an essential resource which must be available not only in the required quantity but also in a precise quality. Nevertheless, in the last years, this quality has been threatened as a consequence of the increasing industrial activity, population growth and agricultural practices. In fact, only less than 1% of the world s freshwater resources are readily available for human use, and even this resource is unevenly distributed among the countries. A lack of water to meet daily needs is a reality for many people around the world, and water scarcity already affects every continent. In the underdeveloped countries, water scarcity forces people to rely on unsafe sources of drinking water. In the developed countries, this problem is much less critical where contamination of drinking water is the adverse... 

In short, there is a scarcity of ideas about how abstract principles are constracted. The classical notions of induction and deduction have some psychological reality, but neither is tenable as the main source of new principles. The hypothesis that principles arise in the resolution of cognitive conflicts has not yet been formulated precisely within the information processing framework. 

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