Conducting a study like the Second Hand Effect is a complex thing and there are certain conditions to take into account. These are some clarifications connected to the method and to some of the ad categories.

Potential saved emissions

It’s difficult to be certain that the production of new goods decreases as a result of secondhand trade and that each item not sold on any of the Schibsted sites is thrown away. Therefore, the results of saved emissions are referred to as potential climate savings. We have been conservative when measuring the potential savings generated by our users, and aggressive when measuring emissions from our own operations – the results communicated are based on prudent approach. We’d also like to point out that the life-cycle method, used in this study, is one of several ways to measure CO2 equivalents.

Including factors

The study is based on:
• Emissions from the extraction of materials
• Production of materials
• Waste management of average products
• Transport of goods between sellers and buyers
• The operation of all sites.

Excluded factors

The study has not taken into consideration:
• The use of the product, such as a car’s petrol consumption, is not included. This distinction has been done as the study focuses on the trading of goods, not their use.
• The climate impact of site visitors, i.e. energy consumption when visiting a site, is not included in the calculation of in 2016.

The car factor

The study has taken into account that the car category needs specific clarifications and calculation adjustment, considering the fact that a car can be re-sold many times.

Through secondhand trade two sources of new emissions can be avoided:

• the production of a new car

• the waste treatment of a car

A car can be up to 20 years old and still be considered viable from an environmental standpoint. This means that you can buy and sell a 20-year-old car and still reduce your carbon footprint. Production represents the main part of the emissions linked to the life cycle of a car.

Reuse rate of cars:

For the car category, a calculation adjustment has been made to meet a more realistic scenario. In reality, cars are normally resold several times (regardless marketplace), this is exemplified by reuse rate. The reuse rate is the turnover of the national car fleet during the average lifespan of a car. Each country has it’s own reuse rate. For the total European result, we’ve used an average of the different nations’ rate.

Factors included in the calculation:

  • X1 million used cars are resold during one year in private transactions in a country.
  • Average lifespan of a car is 17 years in Europe. Average is unless national data supersedes in quality.
  • The national car fleet is X2 millions of cars.

Calculation of reuse rate:

  • During 17 years X1 million cars have changed owner (17 yrs x X1 million = X3 million)
  • This means that every car has in average been sold X4 times during their lifespan (X3 million/X2 = X4)

Refrigerators and freezers

Old refrigerators and freezers contain dangerous substances and consume more energy than new ones. A new refrigerator uses only 40 percent of the electricity needed for an old. Both dangerous substances (in refrigerators CFCs) and energy consumption cause carbon emissions (e.g. CO2).

The Swedish secondhand site Blocket has chosen not allow the sale of refrigerators and freezers older than 10 years since a new appliance is better for the environment compared to a used. Users are instead encouraged to deposit such items at environmentally responsible waste deposits for electronics.