2. Fuels Coal (C) Gasoline (C8H16) Natural Gas (CH4) Hydrogen (H)
Mostly pure carbon
C + O2  CO2
Gasoline (C8H16)
A mixture of hydrocarbons
C8H O2  8 CO2 + 8 H2O
Natural Gas (CH4)
Hydrocarbon (methane)
CH4 + 2 O2  CO2 + 2 H2O
Hydrogen (H)
A chemical element
2 H2 + O2  2 H2O
Bad!
Good!
Greenhouse gases
water

4. Snowflake Photos Courtesy of Prof. Kenneth G. Libbrecht
California Institute of Technology

5. “It’s kind of funny. No two grains of sand are exactly alike, either
“It’s kind of funny. No two grains of sand are exactly alike, either. But nobody cares about that.”
-- Kenneth Libbrecht

59. Thanks to:
Kenneth G. Libbrecht
--Professor of Physics
at Caltech
--and Chairman of the
Physics Department