Assessment and Qualifications Alliance (AQA) GCSE Food Technology Practice Exam

Food waste primarily contributes to increased greenhouse gas emissions when it decomposes in landfills. As organic waste breaks down, it generates methane, a potent greenhouse gas that is significantly more effective at trapping heat in the atmosphere compared to carbon dioxide. This process accelerates climate change as these emissions directly contribute to global warming.

In contrast, the other options do not accurately reflect the impact of food waste on climate change. Stronger ecosystems, reduced carbon footprint, and enhanced soil quality may be associated with sustainable practices and food management but are not relevant to the consequences of food waste itself. Understanding how food waste leads to greenhouse gas emissions highlights the importance of reducing food waste as a critical action in mitigating climate change.