|Multiple MR Points for the Same Material: When is it allowed?|
Recently, I broke one of my long-standing rules and blogged about something BuildingGreen-related at my own blog. My Costanzian fears were indeed warranted, and I've been egged on to cross-post it to the Live blog. Here she is, warts and all: my unvarnished opinion on the very best parts of the BuildingGreen product GreenBuildingAdvisor.com./BF
I don't often blog about worky stuff here, but decided this week that my "Worlds Will Collide!" fears are probably completely unwarranted. Besides, I'm working on some cool stuff these days. And finally, when my wife asks me, "What have you been doing?," when I come to bed at an obscene hour, I have an acceptable answer: "Changing the world, baby. Changing the world."
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Some heating fuels that used to be quite affordable, such as heating oil, have risen in price dramatically, making competing energy sources such as electricity relatively less expensive. In parts of the Northeast and Upper Midwest, even the most expensive form of electric heat — electric-resistance baseboard heat — is now less expensive than fuel oil. The challenge in comparing fuel costs is the fact that most fuels are purchased by volume or weight, rather than energy content. It's hard to compare gallons of fuel oil with hundreds of cubic-feet (ccf) of natural gas and kilowatt-hours (kWh) of electricity. Adding to the complexity, there are big differences in how efficiently energy sources are converted into heat and how efficiently that heat is distributed throughout a building.
To accurately compare the costs of different energy sources, we need to look at the price per delivered unit of heat.
The title of this post is taken from a question we received about the source of recycled rubber used for a parking-bumper and speed-bump manufacturer. It motivated me to do some digging to get a better understanding of the scrap tire industry. As it turns out, it's actually kind of fascinating. The following is unverified single-pass research, and any thoughts, additions, or corrections are welcome.
In a series of developments that may signal trouble for the composite decking industry, two industry leaders, TimberTech and Trex Company, appear to be hedging their bets by introducing new product lines made of virgin PVC... Although both Trex and TimberTech cite consumer benefits for their new PVC products, the Healthy Building Network's Tom Lent has a different view. "I consider these moves a disaster environmentally," he said, adding that the health and environmental effects of the PVC life cycle should also be considered when looking at these decking products.