The knowledge, perception, and behavior of young people toward ecotourism are important for the sustainable development of this sector. The purpose of this research is to evaluate and analyze the knowledge of young Romanian students about ecotourism and the main ecotourism destinations in Romania, their behavior in relation to the practice of this form of sustainable tourism at the local level in the last 2 years (2020 and 2021), and people’s use of the Internet for planning holidays and digital applications while traveling in nature. A quantitative research was conducted based on a self-administered questionnaire, structured in 13 sections on ecotourism, to which were added the sociodemographic data of the respondents. The conclusions of the research are that young people know well the main ecotourism destinations in Romania; they choose them according to the beauty of the landscape, multitude of outdoor activities, and the hospitality of the hosts. In the last 2 years of the pandemic, young people have visited several times the main existing ecotourism destinations locally, with an average vacation duration of 1–3 days. The Internet remains the main source of information, and in the field, they use mobile applications that allow the download of digital maps and recognize different plant species. By integrating various activities in nature, in close connection with the local culture, ecotourism can contribute to the sustainable use of local tourism resources. This study provides a detailed and realistic picture of the knowledge and the type of ecotourism experience that young people want. The implications are theoretical and managerial, highlighting the importance of assessing the preferences of young ecotourists, as a basis for developing ecotourism strategies, sustainable use of local tourism resources, and management of protected areas.

This paper complements the data published thus far about species of the nymphalid family with data collected in Romania’s eight regions between 1887 and 1984 and elsewhere in Europe (Austria, Germany, Croația, the Republic of Moldova, Serbia and Switzerland), including the date and the site of original collection. For the first time, this research presents the collecting information of the species held in the entomological collection of the Museum of Natural History in Sibiu. It identifies the species of the nymphalid family in six of the museum’s lepidoptera collections. These collections are of extraordinary interest not least because they are associated with natural scientists of European renown, such as Daniel Czekelius, Eugen Worell, Viktor Weindel, Rolf Weirauch, Heinrich Hann von Hannenheim and Eckbert Schneider. The analysis, cataloguing, centralisation and updating of the nomenclature resulted in a number of 1,865 specimens from 49 species and fifteen genera (of the 90 referenced in Romania’s fauna): Aglais, Apatura, Araschnia, Argynnis, Brenthis, Boloria, Euphydryas, Inachis, Issoria, Libythea, Limenitis, Melitaea, Neptis, Nymphalis and Polygonia. Data published in a previous article add 101 specimens from the Vanessa genus. Most species originate regionally from the nine counties of Transylvania followed by Oltenia and Moldova (three counties each), Banat and Dobrogea (two counties each), Crișana, Satu Mare and Muntenia (one county each) and the capital of Romania, Bucharest. The species presented in this paper also include the extinct taxon Polygonia egea (Cramer, 1775), Eugen Worrell collection and three species that are endemic to Romania: Melitaea retyezatica Diöszeghy, 1930, Argynnis pandora dacica Hormuzaki, 1892, Daniel Czekelius collection and Boloria pales ([Denis & Schiffermüller], 1775) carpathomeridionalis Crosson et Popescu-Gorj, 1963, both in the Viktor Weindel collection.

The aim of this paper is to evaluate some villages in the mountain area of Sibiu County, Romania, as “smart” tourist villages. The research was carried out in two stages: Stage 1 was collection of information on (a) food products registered in different national and international quality schemes and (b) the number of tourist structures by type, comfort category, and accommodation capacity. Stage 2 was a case study conducted among 32 rural tourism entrepreneurs from 3 villages in Mărginimea Sibiului, using a questionnaire with 22 items on the criteria for evaluation of “smart” villages. The answers were systematized, statistically processed, and interpreted. The main results are as follows: (a) Concerning products, producers, and gastronomic points (PGL) registered, there are 9 products in the quality scheme “mountain product”, 10 producers on the platform “Gusturisibiene”, 1 producer of “telemea de Sibiu”, a registered product with protected geographical indication, and 2 PGL. (b) The number of officially registered tourist structures is 93, of which 72% are agritourism guesthouses. (c) The results for the evaluation of villages as “smart” are that 78.2% of locals use the internet, 74% own at least one smart device, 60.16% of energy used is renewable. There are low values of water and air pollution; there are local job and business opportunities (93.75%); future local development activities will target agriculture with all its sectors and agritourism; public administrations have implemented 7 types of activities to increase the attractiveness of localities; and quality of life, services, and social life aspects are perceived to be at high standards.

The paper wants to analise the emissions removed by a diesel engine fuelled with biodiesel comparative with those eliminated if using a conventional fuel, especially the measurement of carbon quantity from the evacuated gases. For achieving these measurements, an opacimeter will be used, and the higher the opacity is, the higher is the amount of carbon. The measurements were made with the opacimeter through free acceleration between the slow no-load speed and the maximum no-load speed, at a normal functioning regime. Minimum 3 measurements of opacity at free acceleration are made. The results obtained after the experiments show that the opacity values of motor fuelled with biodiesel B 20 are smaller than those of motor fuelled with conventional fuels, at all measured speed values. On the other hand, other elements present in emissions, such as: CO 2, Sulphure oxides, carbon monoxide and material particles are all smalller in the case of using biodiesel as fuel.

This paper complements the data published thus far about species of the nymphalid family with data collected in Romania’s eight regions between 1887–1984 and elsewhere in Europe (Austria, Croatia, the Republic of Moldova, and Serbia), including the date and the site of original collection. For the first time, this research presents the collecting information of the species held in the entomological collection of the Museum of Natural History in Sibiu. It identifies the species of the nymphalid family in six of the museum’s lepidoptera collections. These collections are of extraordinary interest not least because they are associated with natural scientists of European renown such as Daniel Czekelius, Eugen Worell, Viktor Weindel, Rolf Weirauch, Heinrich Hann von Hannenheim, and Eckbert Schneider. The analysis, cataloguing, centralization, and updating of the nomenclature resulted in a number of 1.865 specimens from 49 species and fifteen genera (of the 90 referenced in Romania’s fauna): Aglais, Apatura, Araschnia, Argynnis, Brenthis, Boloria, Euphydryas, Inachis, Issoria, Libythea, Limenitis, Melitaea, Neptis, Nymphalis, Polygonia.  Data published in a previous article adds 101 specimens from the Vanessa genus. Most species originate regionally from the 9 counties of Transylvania followed by Oltenia and Moldova (3 counties each), Banat and Dobrogea (2 counties each), Crișana, Satu Mare, and Muntenia (1 county each), and the capital Buchrest. The species presented in this paper also include the extinct taxon Polygonia egea, Eugen Worrell collection and two species that are endemic to Romania: Melitaea retyezatica, Daniel Czekelius collection and Boloria pales caprathomeridionalis, both Viktor Weindel collection.