primitive energy sources
DESCRIPTION
Primitive energy sources. March 30 th , 2011. Energy sources. Wood Coal Crude oil Tar Animal waste Animal oils and fats Animal & human power Wind power Hydraulic power. Energy usage . Light Heat Food preparation War Medicine Ritual Communication . - PowerPoint PPT PresentationTRANSCRIPT
Primitive energy sources
March 30th, 2011
Energy sources1. Wood 2. Coal 3. Crude oil 4. Tar 5. Animal waste 6. Animal oils and fats7. Animal & human power 8. Wind power9. Hydraulic power
Energy usage
1. Light 2. Heat 3. Food preparation 4. War 5. Medicine 6. Ritual 7. Communication
