The hidden costs of eating meat and dairy foods could be costing us the earth. An increased awareness of the effects of greenhouse gas emissions has led many of us to cut down on the amount of driving we do. Others choose not to fly in an effort to limit their personal contribution to greenhouse gas emissions. Some people try to buy local produce to limit the ‘food miles’ travelled by their food. However, a single dairy cow produces around 400 litres of methane gas each day and cutting out just two cow-based meals a month could reduce your family’s annual greenhouse gas emissions by up to 30 per cent!