A greenish stain stands out in the undulating landscape around Poções, a small municipality in the semi-arid region of the state of Bahia, in the Northeast region of Brazil.
There, the profusion of cacti, succulents and trees of the caatinga, a region of thorny vegetation, contrasts with the surrounding degraded grasses and bare soils.
The person in charge of the «oasis» is the retired engineer Nelson Araújo Filho, 66 years old.
«When I started here, the soil was compacted and it didn’t produce anything,» he told BBC News Brazil.
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