Yes Burning branches and baking sweet potatoes in the open air will produce pollutants such as smoke and dust, which is illegal. Sweet potato, also known as sweet potato, sweet potato and so on. Millet, with round, oval or spindle-shaped tuberous roots in the underground part, with horizontal or ascending stems, occasionally twisted and multi-branched. The shape and color of leaves often vary with varieties, usually with wide oval, different petioles, axillary cymes, oval or oblate capsules, 1 seed.