Crafting climate transitions from below

By Roger Andre Søraa, PhD candidate at Center for Technology and Society Department of Interdisciplinary Studies of Culture, NTNU.

The role of craftspeople in climate-friendly buildings

There are about 2.4 million private-residences in Norway. Altogether, Norwegian buildings account for approximately 40% of all land-energy usage. Building and renovating to more climate-friendly houses, for example passive-houses and low-energy houses, can greatly lower the national energy usage. Many interesting projects have been made and are underway, like Powerhouse Brattøra, shown below. 

But who will do the actual building, and what is their role? 

Wind Assisted Propulsion of Ships

av Zhenju Chuang, ph.d., recently graduated from Institute of Marine Technology, NTNU

Reducing CO₂ Emissions from Shipping

SkySails towing kite

Climate changes have been given a large attention in the media lately. The general opinion is that the recent climate changes are mainly caused by human activities. This together with fluctuations in the oil prices has led to a great focus on energy conservation in the marine industry [1]. Shipping is responsible for more than 90% of world trade, creating   greenhouse gases, like COx, NOx, SOx. Fig 1 shows global CO₂ emissions. It seems that emission from shipping is not as big as other manufacturing industries. However, if we do nothing from now, according to EU prediction, by 2020, SOx will increase 40%, NOx will increase 50% and even more to PM2.5 being 55%.

So now we are facing a big opportunity to explore renewable energy. Wind is the best solutions for shipping since it is sustainable, easily accessible, cost and emission-free.

Wind assisted ship propulsion is becoming more and more popular now. Several main devices will be introduced here. Like sail (soft sail and rigid sail), Flettner rotor, wind turbine and kite.

Figure 1 Global CO₂ emissions