Why can't there be a groundball?

Ground blasting balls are mostly transparent outer layers, and there are other colors to meet the different needs of newcomers. Generally, a ground blasting ball is filled with 30-40 small 5-inch balloons in a 36-inch balloon. If it is an outdoor wedding, about 60 balloons should be placed. The small balloon inside the ground blasting ball is filled with a small amount of helium, so it should be detonated within 2 hours after completion, otherwise the small balloon will not float. This balloon is made of rubber. After it is abandoned, it will certainly produce waste and may cause pollution. The specific situation needs specific analysis. Anyway, this thing should be used as little as possible, because I don't know if it is really harmful. When it is really harmful, it will be too late.