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Philippines

Central North Luzon/ Geography

Land Area: 18,222sqkm (7,036sqmi)

Topography: mountainous, with elevations reaching almost 3,000m (9,843ft) above sea level

Mountains: Mt Bangbang near Buluan, KalingaApayao 1,533m (5030ft); Mt Amuyao on the boundary of Mountain Province and Ifugao 2,702m (8,869ft); Mt Pulog near Barogbog, Nueva Viscaya 2,953m (9,685ft); Mt Talbayoc near Kabayan, Benguet/Ifugao boundary 2,843m (9,328ft)

Rivers: Cagayan river in Nueva Viscaya; Chico river in KalingaApayao and Mountain Province; Ibulao river in Ifugao.

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One particular concern, at least in the West, are lead residues in natural produce destined for direct human consumption, as an excessive intake of lead can cause neurological damage and plays a role in many other medical conditions.