There are two main ways to structure a problem-solution essay. These are similar to the ways to structure cause and effect essays , namely using a block or a chain structure. For the block structure, all of the problems are listed first, and all of the solutions are listed afterwards. For the chain structure, each problem is followed immediately by the solution to that problem. Both types of structure have their merits. The former is generally clearer, especially for shorter essays, while the latter ensures that any solutions you present relate directly to the problems you have given.