1. By clay rust

2. Renewable  Renewable resources are resources that can be easily produced or replenished.  some examples are: Nuclear, Radiant energy, Solar energy, Wind energy, Tidal power, Wave power, Hydroelectricity, Geothermal, Biomass, Compressed Natural Gas, and Biomass Briquettes

3. Non-Renewable Resources  Non-renewable resources are resources that can take millions of years or longer to replenish them self's.  Some examples are: Coal, Petroleum, Black gold (crude oil), Minerals, Natural gas, Gold and silver, and various Metals

4. Some examples of things I have learned  algae is grown very fast and contains much more energy per unit of weight than other biofuels  the initial cost of solar cells can be $1000 per cell where as most houses need more than one.  It was observed that ancient families who ate from silver utensils rarely were sick and had few infections

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