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SIEUSOIL quiz#1
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1/5 of the planet’s topsoil has been lost in the past 150 years
1/4 of the planet’s topsoil has been lost in the past 150 years
1/3 of the planet’s topsoil has been lost in the past 150 years
1/2 of the planet’s topsoil has been lost in the past 150 years
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