In Brazil, 70% of soils are acidic. Acidity is a factor that limits fertility and thus agricultural productivity because it increases soil toxicity and inhibits plants absorption of certain nutrients. In order to correct acidic soils, liming techniques are often used. However, the application of limestone results in CO2 emissions. Higher limestone usage means more carbon dioxide is released into the atmosphere, exacerbating the greenhouse effect.
According to the Brazilian Association of Agricultural Limestone Producers (ABRACAL), in 2013, Brazil consumed 33.5 million tons of limestone. This number amounts to only half of the limestone required to correct Brazilian soils. Thus, it is necessary to find an alternative method to correct soils without exacerbating global warming, since approximately 40% of limestone is converted into CO2.