- News Flash: 020513 Organically coloured website! From plants and insects* 2002 ZERI CERTIFICATION TRAINING The 12 Axioms of Economics based on the ZERI Concept written by Gunter Pauli Purpose: Systems permit merging social, ecological and economic objectives without subsidy or taxation. Growth: Systems increase output with less input, pursuing growth, in co-evolution with nature. Productivity: ...www.zeri.org