1.Jakarta is vulnerable to sinking because the city lies on a low flat basin at the mouth of a river. Other factors that help the issue is the rising of sea levels and flooding.
2. A flood that happened in 2007 that breached the existing seawall caught the governments attention and they decided they needed to take action. Their first part of their plan is to strengthen the existing wall to Jakarta.
3. The biggest hurdle they face is whether or not they can afford the cost. The author is impressed that the government joined in to help with the problem.