This Fourth of July, declare your independence from artery-clogging cheeseburgers, inhumane hot dogs, and carcinogenic chicken and have a healthy, humane vegan cookout. Charred meats can form cancer-causing chemicals called heterocyclic amines, or HCAs, and undercooked meats can cause food poisoning—and both cause animal suffering—so it’s better to cook up something kind and healthy, such as marinated vegetable kabobs, veggie burgers, or vegan barbecued chicken. Vegetables and mock meats, such as Gardein’s The Ultimate Beefless Burger, Beyond…