There are two kinds of solar-heat systems: "passive" systems collect the sunlight that hits your home, and "active" systems collect the sunlight that hits your neighbors' homes, too. -- Dave Barry, "Postpetroleum Guzzler"
There are two kinds of solar-heat systems: "passive" systems collect the sunlight that hits your home, and "active" systems collect the sunlight that hits your neighbors' homes, too. -- Dave Barry, "Postpetroleum Guzzler"