Polish farmers blocked roads nationwide and at border crossings with Ukraine on Friday, kicking off a month-long general strike to protest against EU policies and a lack of government action to protect their livelihoods. Polish farmers have been particularly vocal about the impact of cheap food imports from neighbouring Ukraine. About 100 farmers and 50 cars blocked the approach to Medyka border crossing, blocking traffic for all vehicles, Ukrainian border service spokesman Andriy Demchenko said on television.