yulia fedoseyeva has joined the effort for clean air in her home region.her fellow activists pooled their funds and bought a gas analyzer that measures radioactivity, chlorine, hydrogen sulfides, ammonia and other pollutants. >> we use these data to compile what we call a map of the stench for the whole area and then decide if we can go outside with the kids, or not. >> their results are alarming. the activists report them to the environmental agency regularly. in 2017, the state emergency services finally had to react and measured 25 times the maximum allowed for hydrogen sulfides. activists took the matter to court but with no success. e landfill managers and the city of klin but received no response. and so, yulia fedoseyeva has to consult her detector before she takes her children outside. >> we analyzed the air today. right now, it's looking good, so we can go visit grandma in shchapovo. >> yulia fedoseyeva's 67-year-old mother, valentina agapova, still lives in their home village. >> ilya, come and have some tea and sausage! >> her grandchildren like