As the current issue on building Maewong Dam to defend flood in Nakorn Sawan, what do you think which side is right, let´s look in the detail of each opinion. First side that protest to build the dam consist of environmentalists, university students and other people that support this opinion which lead by Mr. Sasin Chalermlarp ,secretary-general of the Seub Nakasathien Foundation, their proposes are on ecology and economic effect topic. The ecology effect while building and after have built are deforestation and endanger animals. Another effect, economic effect, are the effective on using money and increasing in public debt. Protester think the government should use money on others infrastructure like weir or reservoir (in the order to defend flood), and the public debt will affect several aspect in economy system like increasing of living cost or higher tax. Another side which support to build the dam is the people who live in area, their reason are about their living, the support of water resource on their agriculture and the job that come with the dam project. This is the little information about the contrast on building Maewong Dam which side do you support is depend on you decision, it's the problem that we must use time to study for a while. I hope there are the solution to solve out this problem and benefit people on both side.