How do you remove lichen from concrete paths?

To remove lichen from concrete paths, start by brushing the affected areas with a stiff-bristled broom to loosen the lichen. Then, apply a mixture of water and vinegar or a commercial lichen remover, allowing it to sit for about 15-30 minutes. Scrub the area again with the broom and rinse thoroughly with water. For stubborn lichen, you may need to repeat the process or use a pressure washer.