His work contributed significantly to thermoeconomics and to ecological economics.

Other topics include ecological and sustainable economics and expanding their world view.

The Earth's carrying capacity is a central issue in ecological economics.

He is best known for his work in environmental and ecological economics.

Green economy is an economy or economic development model based on sustainable development and a knowledge of ecological economics.

Røpke, I. (2004) The early history of modern ecological economics.

Røpke, I. (2005) Trends in the development of ecological economics from the late 1980s to the early 2000s.

It has been discussed within the framework of ecological economics.

His focus on research lies in the fields of environmental economics, ecological economics and sustainability science.

It proposed a raft of new taxes and incentives to promote ecological economics.