Over the last thirty years cars sold in Sweden have become larger, and what's more they accelerate ever faster. This has entailed that some of the cars' technical improvements have not led to lower fuel use.
If cars had not become larger and accelerated faster between 1985 and 2007, they would have required 47 percent less fuel. Instead, the actual reduction during the period has been 18 percent.
While interest in environmentally friendly cars has indeed increased in recent years, instead of a shift toward smaller cars with less horsepower, there has been a rise in the number of diesel and ethanol cars. This has led to reduced carbon-dioxide emissions, but more measures are needed to make full use of the potential we have to rein in emissions.
These findings are being presented by Frances Sprei at Chalmers University of Technology in Gothenburg, Sweden, who has spent several years researching developments in newly sold cars in Sweden. Now she is putting forward these new figures in her doctoral dissertation.
"Measures that may lower emissions involve using policy instruments that reduce fuel consumption per se, regardless of fuel type," says Frances Sprei.
Her dissertation is titled "Energy Efficiency Versus Gains in Consumer Amenities" and was publicly defended on September 6 at Chalmers University of Technology in Gothenburg.
Principal supervisor: Professor John Holmberg, Physical Resource Theory, Chalmers, Tel: +46 (0)31 - 772 31 45, email@example.comDeputy supervisor. Sten Karlsson, Physical Resource Theory, Chalmers
Sofie Hebrand | idw
Drought hits rivers first and more strongly than agriculture
06.09.2018 | Max-Planck-Institut für Biogeochemie
Landslides triggered by human activity on the rise
23.08.2018 | European Geosciences Union
The building blocks of matter in our universe were formed in the first 10 microseconds of its existence, according to the currently accepted scientific picture. After the Big Bang about 13.7 billion years ago, matter consisted mainly of quarks and gluons, two types of elementary particles whose interactions are governed by quantum chromodynamics (QCD), the theory of strong interaction. In the early universe, these particles moved (nearly) freely in a quark-gluon plasma.
This is a joint press release of University Muenster and Heidelberg as well as the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt.
Then, in a phase transition, they combined and formed hadrons, among them the building blocks of atomic nuclei, protons and neutrons. In the current issue of...
Thin-film solar cells made of crystalline silicon are inexpensive and achieve efficiencies of a good 14 percent. However, they could do even better if their shiny surfaces reflected less light. A team led by Prof. Christiane Becker from the Helmholtz-Zentrum Berlin (HZB) has now patented a sophisticated new solution to this problem.
"It is not enough simply to bring more light into the cell," says Christiane Becker. Such surface structures can even ultimately reduce the efficiency by...
A study in the journal Bulletin of Marine Science describes a new, blood-red species of octocoral found in Panama. The species in the genus Thesea was discovered in the threatened low-light reef environment on Hannibal Bank, 60 kilometers off mainland Pacific Panama, by researchers at the Smithsonian Tropical Research Institute in Panama (STRI) and the Centro de Investigación en Ciencias del Mar y Limnología (CIMAR) at the University of Costa Rica.
Scientists established the new species, Thesea dalioi, by comparing its physical traits, such as branch thickness and the bright red colony color, with the...
Scientists have succeeded in observing the first long-distance transfer of information in a magnetic group of materials known as antiferromagnets.
An international team of researchers has mapped Nemo's genome, providing the research community with an invaluable resource to decode the response of fish to...
21.09.2018 | Event News
03.09.2018 | Event News
27.08.2018 | Event News
21.09.2018 | Physics and Astronomy
21.09.2018 | Life Sciences
21.09.2018 | Event News