However, there is an issue how to assign the upper limits of emissions fairly and impartially, and if assigned uniformly, it can be disadvantageous to enterprises which have already realized the emissions reduction with their efforts.
しかしながら、排出量の上限を最初にどのように公平に割り振るかが問題であり、一律に割り振ると、既に省エネを徹底していた企業が損をするという問題がある。