Decelerated economic growth is a feature characteristic of mature economies and the GDP growth rate in EU15 states decreased almost 2.5 times during the last 50 year. Similar trends are characteristic of other developed countries, and market economies have adapted to this trend. Even with a decelerated growth rate, the ecological footprint in developed countries currently exceeds three and more times the allowable limits and almost two-thirds of the ecological footprint relates to traditional energy. De-fossilisation by a greater increase in energy efficiency, use of renewable energy, and more intense material recovery is the most promising option for reducing the ecological footprint of these countries. Deceleration of the economic growth rate supplemented by the aforementioned options is a hard but realistic track leading to the reduction of ecological footprint in developed countries to allowable limits without radical de-growth in consumption and production that can result in unpredictable and unacceptable consequences.