Algal bloom control refers to the methods used to manage excessive growth of algae in water bodies, which can harm aquatic ecosystems and water quality. These blooms often occur due to nutrient pollution, particularly from fertilizers and sewage, leading to oxygen depletion and the release of toxins. Common control strategies include reducing nutrient runoff through better land management practices, using biological agents to outcompete harmful algae, and employing physical methods like mechanical harvesting. Monitoring water quality and implementing regulations can also help prevent the conditions that lead to algal blooms, ensuring healthier aquatic environments.