Learn Engineering

http://interestingengineering.com/skyscrapers-taking-green/

http://sobadsogood.com//youll-be-amazed-these-decomposabl/

Some pics related to GIS

Breakthroughs in switchgear technology with eco-efficient gases as an alternative to SF6 ABB commissions world’s first switchgear installation with new eco-efficient gas. For decades Sulfur Hexa flouride has been predominant insulation medium for high and medium voltage switchgear due to its extraordinary and astounding technical properties. But now in perspective of reducing man made global warming effect , ABB has acheived a new milestone by implementing latest eco-efficien...t technology. This new gas mixture contains: - Fluoroketone (C5-PFK), carbon dioxide (CO2) and oxygen (O2) for high-voltage GIS - Fluoroketone (C5-PFK), nitrogen (N2) and oxygen (O2) for medium-voltage GIS . See more