Successful teaching of earth sciences, in particular the theory of plate tectonics, requires, among other things, a pedagogical change, which is the factor that almost all teachers do not yet take into account. These sciences are unfortunately presented by our teachers in a way that leaves them in the eyes of our students as a series of discoveries that is made in a random and simple way and away from any problem that gives birth to them.

This study makes it possible to contribute to the comprehension of the management of domestic waste and especially waste plastic in the commune of Ibanda.
Analysis of the data, it arises that the households of the Commune of Ibanda have a bad practice on the modes of management of the plastic sachets because some throw them in main street of the commune, others without Trier nor to recycle them, throw them in the lake Kivu, the Kawa river or the Ruzizi river. Indeed, due to the practice of not controlled wild discharges, waste is currently carted towards Lake Kivu, and this phenomenon contributes to increase the imbalance of this ecosystem. In this Commune, the day laborers production of waste by the population is on average of 0,96kg/j. Vis-a-vis the impacts of these risks, the commune of Ibanda, must put public dustbins in the principal arteries of the commune at least 200 with 500m separating them.

This study was led in order to evaluate the health risks related to water, hygiene and cleansing in the two surfaces of health of kalehe in the east of the Democratic Republic of Congo (RDC).Several factors make difficult the control of the management of the urban cleansing and the access to drinking water. Within the framework of this study, investigations spares and of observation were realized to evaluate the impact of basic hygiene and the supply drinking water. It arises that the problem of the availability of drinking water in the two surfaces of continuous health selected to be a major concern for the population. Domestic waste is badly managed with causes of the absence of infrastructures of hygiene and basic cleansing, a lack of synergy of action of the actors. Concerning the other conveniences of the habitat, approximately 54, 8 % of the households do not have latrines with presence of the excrements in the court (69, 9 %). For the evacuation of the household refuse (56, 2%) throw them in the rivers what degrades the environment in these two surfaces of health of the zone of health of kalehe. A sensitizing of the population in the management of domestic waste to avoid the diseases due to the bad management of waste and the good management of water is recommended. The persistence of such practices is likely to increase the environmental and medical problems.