the Tropical zone. In the winter the infiltration of cold air from the polar front is relatively common, and frosts can occur. Flora The city, planned from its inception, offers an enviable flora. Maringá has a high rate of concentration of green area per capita, there are of native forest on 17 preserved areas. The city preserves within its limits large areas of native forest in the Horto Florestal, Parque dos Pioneiros (Bosque II) and Parque do Inga, this being open to the public. It also includes smaller preserved areas as the Parque do Cinquentenário, private areas and so on. Throughout the year it is possible to observe its tree-lined streets that produce a good air to breathe, but especially in the passage from winter to spring, many trees explode in flowers. Maringá has one of the highest concentration rates of green area, per inhabitant, 90 bushels of native forest in 17 forests. Pollution Even with the normal problems of urban centers, Maringá preserves its reputation as a green city, ecologically well cared for. Its origin had planning, urban planning - forest reserves, central construction site, wide avenues, several species of trees that follow a Master Plan Proportionally, Maringá has one of the largest fleets per capita of vehicles of Paraná State. Because of it, there are some places of the city with pollution levels above the recommended. Two regions in the city are the biggest problems, they are the avenue Duque de Caxias and Colombo. Industries, pesticides, noise pollution and household waste, also contribute very significantly to the pollution of the city. In spite of this, Maringá still preserves a reputation of green city. Economy Maringá is highlighted today by the commercial sector and service delivery. The service sector is Maringá's largest (76,74%), followed by industrial (22,29%) and farming (0,97%). Within industry, the food-processing, chemical and textile sectors predominate. Agriculture The agriculture still is fundamental for Maringá, although its importance has declined in recent years. Farming is diversified, and besides coffee, today are produced corn, wheat, cotton, ramie, beans, peanuts, rice, sugar cane, and especially soybeans. Industry Among the various segments in the industrial sector of Maringá, there are metal-mechanics, agribusiness, textile and food companies. The industrial sector is not as expressive as agriculture, but it's growing. The city has a growing fleet that handles weaving and agribusiness, but mostly clothing. Big industries such as Cocamar, Coca-Cola, Noma, among