A multi-million-dollar paper recycling plant needs an unvarying stream of constant quality old paper to operate;it cannot afford to be down a day if volunteers tire of bundling their used newspapers.

• 一家具有数百万美元回收能力的再生纸厂的运转需要连续不断的优质废纸供应，假如自愿者不再捆绑他们的旧报纸，纸厂便一天也不能支持。