Although iron is generally less active in many catalytic applications , it is less expensive and `` greener '' than other metals . Although iron in many catalytic applications is generally less active , it is less expensive and `` greener than other metals .
Walaupun besi umumnya kurang aktif dalam banyak aplikasi pemangkin, ia lebih murah dan "lebih hijau" daripada logam lain. Walaupun besi dalam banyak aplikasi pemangkin umumnya kurang aktif, ia lebih murah dan "lebih hijau daripada logam lain.