What materials are balloons made of? Will they pollute the environment?

High-quality balloons are made of environmentally friendly rubber. Degradation begins when the balloon is inflated and exposed to air. This can be confirmed by the oxidation phenomenon on the surface of the balloon: soon after the balloon is inflated, a layer of fog appears on the surface. Heat and sunlight will speed up this process. High-quality balloons will eventually look like leaves and can decompose into the soil in as little as a few weeks without causing environmental pollution.