When we began these bi-weekly round-ups of readers' comments back in October, we did so with one key aim: to encourage open, democratic debate with a very low barrier for entry - the type of internet-enabled debate that many architecture critics and publications have given up on. This week, we got a taste of just that kind of rational, professional debate as our readers picked apart the popular opinion in the wider media that the renovation of Cádiz Castle was "a perfect example of how not to restore an old castle." Alongside debates on whether architecture is a form of art and what the AIA should be doing about sustainability, read on to see what our readers had to say after the break.

The past two weeks in architecture have provided plenty to talk about in thanks to some big news stories, such as the opening of Santiago Calatrava’s World Trade Center Transportation Hub, and some hotly-debated articles, such as Lance Hosey’s critique of the AIA’s sustainability leadership. As a result, it’s been a busy couple of weeks in our comment section - read on to find out what ArchDaily readers had to say.

In the face of global doomsday predictions, sustainability has become one of the most crucial aspects of the 21st century, now playing a huge role in everything from politics to the way you dispose of your trash. Fortunately, most architects understand sustainability implicitly, and have adopted it into their lives and work. Or have they? In this article, originally published on Common Edge as "Why Architects Don't Get It," green building expert Lance Hosey highlights the failures of the architecture community in reaching their stated sustainability goals, and argues for a new conception of architecture in which good design and sustainable design are integrated.

A few years ago, the American Institute of Architects, the self-declared “voice of the architecture profession,” announced that "AIA members will no longer need to complete the sustainable design requirement to fulfill their AIA continuing education." Why? Because “sustainable design practices have become a mainstream design intention.” Hooray! If sustainability is “mainstream” now, and knowledge about it is no longer necessary “to maintain competency” and “to advance and improve the profession”—the purpose of continuing education, according to the AIA—then the profession must have met its environmental goals, and there’s nothing left to improve. Mission accomplished.

If only.

Material Minds, presented by ArchDaily Materials, is our new series of short interviews with architects, designers, scientists, and others who use architectural materials in innovative ways. Enjoy!

Wood. The United States is the largest producer of the natural resource in the world. But yet we rarely see it in commercial, high-rise construction. So we asked a wood expert -- Rebecca Holt at Perkins+Will, an analyst for reThink Wood's recent Tall Wood Survey -- to tell us about its potential benefits.

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There are lots of reasons to consider wood – first it has a lower environmental impact than other traditional choices like concrete and steel. Wood is the only major building material that is made the by sun and is completely renewable.