Germany’s clean-technologies industry is set to more than double in volume by 2025, creating jobs and maintaining its global market share, a study shows.

The volume of German companies in areas such as resource efficiency, sustainable transport and recycling will rise 125 percent to 674 billion euros ($862 billion), Roland Berger Strategy Consultants said. They’ll keep a market share of about 15 percent while creating an expected 1 million jobs, it said.

“Green technologies are growth technologies,” Environment Minister Peter Altmaier, who commissioned the study, said today in Berlin. “We still have a leading position in clean technologies and we will do everything to defend that.”

Germany, Europe’s biggest economy, plans to increase its reliance on renewable sources of power such as solar and wind as it phases out nuclear generation. Domestic technology companies such as Solarworld AG (SWV) must contend with rising competition from Asia, where investment in clean energy has soared.

The German clean-tech industry is dominated by small- and medium-sized businesses that have helped stabilize the nation’s economy, Altmaier said. The country has a target to raise energy efficiency and lower greenhouse-gas emissions 40 percent by 2020 from 1990 levels.

The global clean-tech market will more than double to 4.4 trillion euros by 2025, according to the Roland Berger study.

To contact the reporter on this story: Stefan Nicola in Berlin at snicola2@bloomberg.net

To contact the editor responsible for this story: Reed Landberg at landberg@bloomberg.net