The Power of Human Waste

In ancient Rome, what was one of the uses of human waste?

• To generate electricity

• As manure in kitchen gardens

• As a currency

• To build roads

What is a key advantage of bio-gas over traditional fuels?

• It is a cleaner fuel

• It produces more pollution

• It is less efficient

• It is more expensive

What percentage of global water use is attributed to agriculture?

• 85%

• 90%

• 72%

• 50%

Which country recycles almost 90% of its used water for agricultural purposes?

• Israel

• India

• China

• United States

What is the predicted market value of innovative toilet designs by 2030?

• One billion US dollars

• Three billion US dollars

• Ten billion US dollars

• Six billion US dollars