By: Patrick Kiger
If you were an extraterrestrial scientist studying planet Earth, the signature achievement of its human inhabitants probably wouldn't be the Great Wall of China or the Pyramids or the Panama Canal. No, the thing that would impress aliens the most would be how, over the past 8,000 years, people have cut down about half of the lush green forests that once covered much of the planet's land mass. The problem is that it probably would impress the aliens as one of the stupidest things they'd ever seen. Forests, after all, provide humans with everything from building materials to medicines, and, perhaps more importantly, serve as massive carbon dioxide filter.
So, perhaps in an effort combat future alien scrutiny, I present to you the hot new architectural trend: green skyscrapers. You may be thinking: "What's the big deal?" But I'm not talking "green" in the figurative, sustainable-building-materials-and-solar-panels-on-the-roof sense. I'm talking literally green -- in that these towering urban high-rises would be filled with trees as well as people. In fact, judging by the looks of some of the designs, there may be more vegetation than human inhabitants.