The German magazine Detail provides a very detailed—naturally—summary of this LEED Platinum retrofit.
The 155-meter tall towers were completed in 1985 and renovated this year to the USGBC’s highest rating, while also achieving certification by the German DGNB.
Recycling: 98% of the construction debris was recycled.
Heating and Cooling: 67% reduction in energy for heating and cooling.
Electicity: 55% less electricity required.
Water: 74% less water.
Carbon Dioxide: 89% less CO2 per year (equivalent to removing 6000 cars from the road).