Articles With "Green Business" Tag

Human Bones + Nanoengineering = Green Concrete?

Greenconcrete_2 The following post may seem a little esoteric, if not absolutely dry, but don’t be intimidated.  Bear with me a second as the idea opens up towards the end of this article.  Every year, roughly 1.89 billion tons of cement (the main component of concrete) are manufactured.  Cement accounts for about 7-8% of all human-generated CO2 emissions (a main ingredient in the recipe for climate change).  Here’s what happens: cement is made by burning fossil fuels to heat a limestone and clay powder to 1500 °C.  Then, the resulting cement powder is mixed with water and gravel and the invested energy in the powder is released into chemical bonds that form calcium silicate hydrates.  Those calcium silicate hydrates bind the gravel to create concrete. 

So, the idea goes, human bone could show us how to manufacture concrete with less CO2 emissions.  Human bone achieves a similar packing density to concrete at the nanoscale, but with human bone, this packing density is achieved at body temperature with no extra release of CO2.  Stated otherwise, bone strength is achieved naturally without having to heat powder at a high temperature, and thus, without the CO2 release.  The problem is, however, the hardening of apatite minerals in the bone takes a long time.  Say, a month or more. 

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Green Roofs, Cleantech Investments, Monster Homes + Stellar LEED Returns (WIR)

Week in Review
  1. Rooftop vegetation and gardens are catching on–though there are still many questions about how and when to apply the technique. 
  2. Cleantech venture capital investments are small but growing. 
  3. Monster Homes: Enough is Enough – some places will make you pay for that big thing. 
  4. Developer sells its LEED certified project and it was "certainly a stellar return." 

The Jetson Green Sustainability Bookstore

Sustainability Bookstore

If you know me, you know I like to read.  You name it, I read it.  Books.  Magazines.  Newspapers.  Online.  Actually, I have a theory on book reading, which goes like this:  if you don’t pay reasonable market value for it, you won’t be motivated to read it.  It’s like a gym membership.  With this in mind, I’ve put together an online shop of sustainable books, The Jetson Green Sustainability Bookstore, in case anyone is searching for good material on environmentalism.  There’s a lot out there.  Let me know if I left something out that you think merits inclusion.  Here are the categories:

++ Magazines + Prefab/Small + Architecture/Design ++
++ Non-fiction/Business + Green Lifestyle ++

This isn’t a money maker for JG, I’ve never made more than $10 /quarter from Amazon…this is more intended to be a resource library for those of us at all levels in the journey towards living and working in a greener way.  Again, let me know if I left a good book out.  Also, I’ve gotten into Eco-Libris thanks to Victoria-E.  Eco-Libris plants a tree for every book that you purchase an offset for.  I’m not going to get into the offset controversy, but suffice it to say, I like the idea and will do it from now on.



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