LIBROS DEL AUTOR: a guna

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  • Generating Free Electricity at Home with Solar Energy
    A. Guna / AGuna
    Accelerated human activity since the 1950s have led to the current instability and damage to the world’s ecological systems. Although significant technological progress has been made, mistakes have also been made. In the early twenty first century, we are experiencing the consequences of some of our mistakes in the form of global warming and climate change. It is now time to pu...
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    29,05 €