Construction Going Up – Ecology Going Down?
From 2010 to 2015 warehouse new construction in the US tippled from around $5 Billion to $15 Billion with all the economic benefits. 15 Billion in new construction equals around 1000 new warehouses every year or approximately 250 million square feet rooftops plus the same amount of infrastructure provision. Annually, 500 Million square feet or 8800 football fields of lost nature by building new warehouses in the United States alone.
With some of the existing warehouses, this translates to a potential of at least 1 Billion of square feet of new extensive Green Roofs every year that could retain the volume of Lake Constance that is surrounded by three countries (Germany, Switzerland and Austria) or over the double volume of Lake Powell (UT/AZ)!
Assuming that these Green Roofs are done right, maintained by professionals and without artificial irrigation, the natural and controlled succession of these Green Roofs would allow a unique habitat for many endangered species over the upcoming years.
These green roofs can also reduce the re-roofing costs by multiple billion Dollars with a related relieve for landfills and a huge reduction in energy use.
Most important however is the climate effect.
Warehouse belts surround any large city in North America. These warehouse belts with endless impervious areas actually preheat the air that is conveyed into our cities by the wind. In the worst-case scenario, these large warehouses have reflective roofing membranes that might cool the building but also increase – due to reflection – the heat in the atmosphere substantially.
Warehouse belts around cities are like a forced air heating system in a building only on a much larger scale – Warehouse belts are a wasteful forced air heating system for entire cities
Fundamental sustainable thinking and large scale long-term research hardly exists in the US, so it is no wonder that experts are likely to miss the entire picture.
Currently in the US there are no significant requirements or ecological considerations in master plans that address this counterproductive climate habits towards our cities. Actually, it seems that warehouse belts grow faster than Green Roofs!
North American ecological organizations, LEED, or other industry associations are also missing the bigger picture. They often work locally – from one block to the next, they are focused on one or two rare plants, on a distinctive bee species, butterflies or other human pleasing critters as long as there is an instant payback in popularity. It seems worth more having a highly unsustainable fully irrigated Green Wall in the cafeteria, a nice green plaque on the wall, or growing some carrots on the roof to demonstrate social and sustainable responsibility. Most marketing efforts for green washing are beyond the costs of a simple highly efficient extensive Green Roof that helps the future generations.
The United States is a great country and North America is a large continent where thinking big was always wanted and welcome. Now it seems people are getting lost in their little plastic boxes, made in China with some nice flowers and a watering can next to it.
It is very romantic but also very embarrassing.