Why did people laugh at Noah?

People laughed at Noah because he was building an enormous ark in a time when rain was uncommon, and he claimed a great flood was coming to cleanse the world. His warnings about impending disaster seemed ridiculous to those around him, leading them to mock his faith and efforts. Additionally, the sheer scale of the project and its unconventional nature contributed to their disbelief and scorn. Ultimately, Noah's unwavering conviction contrasted sharply with the skepticism of his contemporaries.