Ukrainian authorities say about 30 percent of the country is contaminated by Russian landmines, unexploded ordnance and other explosives. They pose a threat to civilian life and make land off-limits for farming. Among the most contaminated regions are Mykolaiv, Kherson, Donetsk and Kharkiv. DW spoke with Oleksandr Lobov, a Mine Action Specialist with the UN Development Programme in Ukraine.