Kathmandu, 2 May:  The activities of European Union (EU) have posed grave challenges in maintaining social harmony and national unity of Nepal. According to Ghatana Ra Bichar vernacular weekly, EU and its other associated organizations are found to have involved in undermining Nepal's national unity, internal cordiality and goodwill subsisting among various castes. A section of people are actively engaged in advocating slaughtering the national animal cow as well as jeopardizing ethnic and regional peace and harmony. EU's latest provocative public notice is not only against the spirit of Nepal's inclusive constitution but also against all legal documents.  EU, in its public notice soliciting proposals for the project categorically used the term 'sub-national' which is unwarranted. People's News Monitoring Service