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Information × Registration Number 2116U002839, Article popup.category Thesis Title popup.author popup.publication 01-01-2016 popup.source_user Сумський державний університет popup.source http://essuir.sumdu.edu.ua/handle/123456789/45948 popup.publisher Sumy State University Description Nowadays, we have a lot of problems dealt with environment. A lot of plants, factories and cars all over the world throw harmful substances into the air every day. Many countries use alternative sources of energy, like hydro, solar, wind energy instead of old one, that pollute our nature. popup.nrat_date 2025-05-12 Close