> ‘Global Warming = Greenhouse Gases + Land Degradation affects Water Cycle’ . ‘Global Warming = Greenhouse Gases + Land Degradation affects Water Cycle + τ’,

> ‘Global Warming = Greenhouse Gases + Land Degradation affects Water Cycle’ . ‘Global Warming = Greenhouse Gases + Land Degradation affects Water Cycle + τ’, where τ is all the rest.