Land Use Changes: The production of corn ethanol requires significant agricultural land, which can lead to deforestation and other land use changes that release carbon stored in forests.

Emission Comparisons: While corn ethanol is often considered a renewable energy source, its production and combustion may emit more greenhouse gases than petrol, particularly when considering the full lifecycle of the fuel.

Economic and Policy Implications: The article suggests that policies promoting corn ethanol may need to be reevaluated in light of its potential environmental drawbacks.