Holocaust Stories Vs Science - How Does Open Air Cremation Work

It's said that in the holocaust 1.7 million Jews were killed in gas chambers at the three "death camps" Belzec, Sobibor, and Treblinka. But what happened to the bodies?

According to the story of the holocaust, the bodies were all burned on improvised outdoor "grill racks". Thousands of bodies were reduced to ash every day, in fires that consumed only a small amount of fuel. But is this really possible? Just what does it take to cremate a body in the open air? This holocaust documentary looks into these questions, using holocaust survivor accounts, the information made available by holocaust museums, the works of holocaust scholars, and experimental data on cremation