The aim of the manuscript was to present collective results research on profitability using various renewable sources in Poland with greatest development potential. In paper, economic parameters investment projects were determined and calculated, i.e., Net Capital Value (NPV), Internal Rate Return (IRR) Period Invested (PBT). assessment use RES technologies supplemented environmental benefits. ...

Overfishing of large predatory fish populations has resulted in lasting restructurings of entire marine food webs worldwide, with serious socio-economic consequences. Fortunately, some degraded ecosystems show signs of recovery. A key challenge for ecosystem management is to anticipate the degree to which recovery is possible. By applying a statistical food-web model, using the Baltic Sea as a ...

today, determination of the ecological species groups for current and future situation of forest and its relationship with environmental factors is necessary for forest management. for this purpose, 50 plots were established in altitude range of 2091- 2811 meters above sea level and 600 hectare in protected area of western dena. four ecological groups was identified using twinspan analysis that...

Operational models of economic activity, particularly at the farm scale, have become commonly used, and widely accepted methods and applications exist. Operational models of ecological systems probably have less of a history but processes of species interaction and succession are well documented. Relationships between economic farm-scale variables and resultant ecological diversity, however, ar...

introduction urban landscape is experiencing rapid changes which put all urban domains under pressures. these processes revolutionize urban landscape into spaces without ecologic values. the sustainability of green patches and corridors has been scathed by lack of ecological approaches in planning and design. therefore, urban green spaces structures and functions have been damaged. green spaces...

Which rates should we use to discount costs and benefits of different nature at different time horizons? We answer to this question by considering a representative agent consuming two goods whose availability evolves over time in a stochastic way. We extend the Ramsey rule by taking into account of the degree of substitutability between the two goods and of the uncertainty surrounding the econo...