They call teleshopping “junk(垃圾) on the air”.Many Europeans usually worry about the quality...Junk on the

They call teleshopping “junk(垃圾) on the air”.Many Europeans usually worry about the quality...
Junk on the

看全句的下文就比较清楚了：
junk on the air意思是电视垃圾,指的是电视购物,许多欧洲人就没有办法保证所购商品的质量（通过电视购物的形式）