Product Description: The benefits of a greenhouse are obvious and compelling: relief from winter's darkness; year-found gardening; a weather-proof space for basking and relaxing at any time of year; passive solar heating. But what about the costs? Of construction, of heating, of keeping the whole thing going? The thesis of this book will be that these costs can be minimized with very little sacrifice of the benefits by turning solely to the sun for heat, with no reliance whatsoever on fossil fuels...read more