Rechargeable cars are being sold like never before.

The share so far this year is almost 30 percent, according to the industry association Bil Sweden's statistics.

But big and heavy cars are increasingly dominating.

35 percent of the bonus cars sold this year weighed over two tons.

Last year, the figure was 26 percent during the same period.

"Worse for the climate"

The SUV trend is thus also visible among the cars that are classified as green cars.

Sweden has the heaviest car fleet in the entire EU.

- Heavier cars are always worse for the climate, says physics professor Öivind Andersson at Lund University.

Öivind Andersson researches the environmental impact of cars throughout the life cycle, from manufacturing to driving.

He thinks the development goes against the climate goals.

- A heavy car requires more energy and emissions during production, and more when it is driven.

This is how development is going in the wrong direction, he says.

Hazardous particles

Heavy vehicles also cause more wear on roads and tires, which leads to more emissions of hazardous particles.

Among clean electric cars, large batteries are one explanation for the cars becoming heavy.

Many popular electric car models are large.

The most popular Tesla weighs 1.9 tons, and the larger Tesla S weighs 2.3 tons.

The Audi E-tron weighs 2.6 tons.

Small electric cars such as the Renault Zoe and BMW i3 weigh a ton less than the largest electric car models.