Why our food is so dependent on oil

Global food prices have hit their highest level in over three years. We are told this is due to rising oil and energy costs, but how exactly do they affect prices? The most reported reason is that transport and fertiliser are to blame, but the reality is that the oil and gas industry is far more integrated in our food production than many of us realise. To get a better understanding, Josh Toussaint-Strauss takes a closer look at the production processes of three categories of food: meat, processed staples and fruit and vegetables. What he discovers is a level of involvement that is shocking

Reporting from The Guardian contributed to this story.