One possible solution that mitigates the effects of climate change is the implementation of vertical greenery systems, which have the potential to reduce the need for cooling and provide energy savings for heating. This paper evaluates the effects of an innovative modular green wall on indoor temperature and energy use in a residential case study building. This research was carried out on a residential house in the city of Ghent, Belgium, whose southwest facade is covered with a specific type of modular green wall (a structure with a specific substrate and plants that have the ability to purify water so that it can be reused in the house). The monitoring process included four different temperatures (in front of and behind the green wall, in the substrate, and on the wall without greenery) during winter and summer periods. To analyze the effect on the internal temperature and energy use, a DesignBuilder simulation model was built and validated against these experimental results. This green wall has proven to have the greatest effect during the hottest summer days by reducing the indoor temperature by up to 3.5 °C. It also effectively increases the indoor temperature by up to 1.4 °C on a cold winter day, leading to energy savings of 6% on an annual basis.

This paper analyzes the presence and quality of urban green areas in two local communities in the City of Banja Luka, namely: Lazarevo 1 and Lazarevo 2. The aim is to examine which categories and types of green areas are most represented in the study area and what is the quality of existing tree-lines. Two research questions were asked: whether all species are equally presented in the study area and whether the linden species present in this area get sick more often than other species. Part of the results was presented using descriptive statistics (frequency) methods, and to the other part non-parametric tests were applied, Pearson's χ²-test using two basic forms: distribution shape test and χ² test of independence.