7.2. If as much as 25% water that flooded Ayutthaya, Bangkok and other provinces in 2011 is from the north and if planting trees in the mountains in the north reduce the amount of flood water, then explain how interest of these three groups of people are interrelated: (a) people in the hill, (b) farmers whose land is used for flood protection and (c) beneficiaries of flood protection. When rice farm is inundated, people harm and benefit from it?