france and the flanders region of belgium where there was a bitter war of attrition between allied and german forces both sides fired millions of tons of munitions and for the first time the world witnessed the large scale deployment of chemical weapons. well one focus of the clashes was the belgian town of april where large quantities of war remnants such as unexploded munitions and poison gas canisters are on earth each year for farmers like heads dinero there s what they call an ion harvest to be brought in from the fields alongside their ordinary crops. it s harvest season and for flemish farmers. that means long working hours he gathers several tons of leaks in potatoes every day. this is west flanders belgium s westernmost province. when farmers here harvest their crops they