Researchers in China have studied the shinglelike structure of butterfly wings, which they say are especially efficient in absorbing sunlight, and have built a prototype based on it.
This revised edition of The Renewable Energy Handbook focuses on the unique requirements of off-grid living as well as using "green" energy for homeowners who remain connected to the electrical utility. The book contains chapters on:
* Energy efficiency and economics
* Home heating and cooling and domestic water heating
* Photovoltaic, wind, and micro-hydro energy generation
* Battery selection and inverters
* Backup power, wireless communications, etc.
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