There's an exciting new hybrid solar collector from Turkey that combines photovoltaic (PV) power generation with solar water heating. The idea of combining PV and solar-thermal isn't new, but Solimpeks Solar Energy Corp. has taken the idea to a new level of sophistication with their Volther hybrid solar collector.

I'm sorry, but the irony is just too thick these days. We Americans are rightly upset with BP for the devastating spill in the Gulf that is wreaking ecological devastation on a mammoth scale. But as I watch the television news and read the daily coverage, I'm not hearing enough outrage at our petroleum-dependent lifestyles and the gas-guzzling vehicles we hop into at a moment's notice to drive to the store for a pint of ice cream. We need to hold a mirror up to ourselves at those protest rallies.

A three-year-old North Carolina company, Earthstone Products, has introduced a great-looking, relatively inexpensive recycled-granite paver. Used both indoors and outdoors, the pavers are manufactured from waste slabs of granite.

EPA's new specification for water-efficient homes works well for all sorts of builders and even remodelers Although EPA's criteria for WaterSense labeled new homes were only recently released, custom and production builders from Georgia to Arizona, from Montana to Hawaii, are signing up.

Can insulation materials, which we use to save energy and help prevent climate change, cause greenhouse gas emissions? Yes, in two ways. First, it takes energy to produce and ship these materials--which we refer to as "embodied energy"--and using fossil fuels for these energy needs releases carbon dioxide (our most significant greenhouse gas). So in a sense, all insulation materials have embodied global warming potential (GWP). Second, two of our common insulation materials are made with hydrofluorocarbon (HFC) blowing agents that are very potent greenhouse gases.