Natural adhesives are substances derived from natural sources, such as plants and animals. Common examples include starch, casein (a protein found in milk), and animal glues. These adhesives are often biodegradable and less toxic than synthetic options, making them environmentally friendly choices for various applications. These adhesives are used in many industries, including woodworking, packaging, and textiles. They can bond materials like paper, wood, and fabric effectively. Natural adhesives are valued for their ability to provide strong adhesion while being safe for both users and the environment.