Pro: Parks, woods, gardens, and public areas represent an important and sizable portion of the city. The strict tree initiatives prohibit the cutting down trees without a permit and require that, for every tree that is cut down, two be planted.
Con: In part a victim of its own success, Curitiba has attracted thousands of squatters to shantytowns. Squatters often occupy land by rivers, both to obtain a water source and because, by law, the riverbanks can't be developed. Raw sewage from these settlements flows directly into the rivers.
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