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More by Jim Ollhoff

Icon image Fossil Fuels

Icon image Geothermal, Biomass, and Hydrogen

Geothermal, Biomass, and Hydrogen

Icon image World in Crisis

World in Crisis

Icon image Nuclear Energy

Icon image World in Crisis

World in Crisis

Icon image Wind and Water

Icon image Wind and Water

Icon image Social Solutions

Social Solutions

Icon image Technological Solutions

Technological Solutions

Icon image Solar Power

Icon image Geothermal, Biomass, and Hydrogen

Geothermal, Biomass, and Hydrogen

Icon image Solar Power

Icon image Black Death

Icon image Malaria

Icon image What Are Germs?

What Are Germs?

Icon image Smallpox

Icon image What Are Germs?

What Are Germs?

Icon image Black Death

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