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The water cycle is critical not only to weather, but to life on earth. Rain is necessary for the survival of plants and humans. Condensation is necessary for cloud formation. Evaporation is necessary to cooling and keeping a good balance of water vapor in the air.
In Brazil, the wet season is correlated with weaker trade winds off the ocean. The pH level of water becomes more balanced due to the charging of local aquifers during the wet season. Water also softens, as the concentration of dissolved materials reduces during the rainy season. Erosion is also increased during rainy periods.