The main objective of this study is to make profitable the exploitation of fresh cocoa in the sector of Nganda Tsundi, Tshela Territory, Kongo Central Province, in the Democratic Republic of Congo, in order to improve the well-being of its population. The documentary review on cocoa cultivation, the survey of 69 cocoa farmers and the breakdown of data; have formed the methodological approach begun. The results showed that: 91.8% of income is over-spent by village planters for harvest because of the lack of specific tasks for this operation, compared to SCAM's production standards for the same crop, or to harvest pods to produce 111,666 Kg of beans, 20,040,000 FC are spent in the village instead of 1,642,000 FC at the SCAM. The planters pay the labour to pick up the pods at harvest while the SCAM assimilates this operation to the harvest. So for milled beans equivalent to 111.666 Kg the planters lose 3.480.000FC against zero costs to the SCAM. As for the total cost of production, the production of 111,666 kg of fresh beans results in 52.16% of expenditures by the cocoa farmers of Phalanga Ndenga, whereas it would only result in 7.68% of expenditures at the SCAM. Make this profitable exploitation among the farmers of Phalanga Ndenga, contributed to the reduction of the anthropic pressure of the forest ecosystems of this sector.

Contributing to the fight against waterborne diseases in the Kakongo sector in the DRC is the overall objective of this research. Water samples taken from sixteen sources in sixteen villages belonging to four groups in this sector were sent to the laboratory in accordance with WHO standards. Indeed, the results of physico-chemical analyzes in the laboratory have shown that almost all the sources of water consumed by the population of this sector is not drinkable. Microbiological analyzes have shown that 50% of the sources are started with Escherichia coli, 81.2% with total germs and 68.7% with faecal coliforms, proof that on the basis of WHO requirements, the waters of these sources are unfit for human consumption. The danger remains open in this sector, it is imperative and urgent to develop these sources, popularize good techniques of household waste management and consider sustainable environmental education among the people of the province of Kongo Central in general and the Kakongo sector in particular, if we want to save a multitude of lives at risk as advocated by the Millennium Development Goals. The consumption of these waters without any treatment presents very serious health risks for the population.