Preservationists are accusing government agencies in Azerbaijan of architectural vandalism as the capital, Baku, prepares to host the annual United Nations climate conference. The UN conclave of environmentalists will convene in Baku in November. Azerbaijani authorities are already hard at work sprucing up the host city. But according to local architects and others, their methods to improve the city’s look are doing more harm than good. A torrent of criticism has circulated on social media. One Baku-based architect Abdul Huseynov voiced alarm on Facebook in mid-June about touch ups to an histo…