Celebrate National Parks and Recreation Month this July with an activity that helps protect your local park: pulling weeds. No, really it makes a difference! That’s because some non-native plants can become invasive species, disrupting the ecosystem by spreading diseases and competing with native flora for food and space. Control programs for invasive species give volunteers a chance to literally weed out plants that are destroying their park’s landscapes, says Rich Dolesh, vice president for conservation and parks for the National Recreation and Park Association. Learn more at invasivespecies.gov.