A significant portion of global food production is lost or wasted before consumption. This section explores how inefficiencies in supply chains, storage, and consumer behaviour contribute to food waste. It also highlights how reducing waste can improve sustainability and reduce environmental pressure.

Plastic materials have transformed modern life but created long-term environmental challenges. Learners examine how plastic is produced, how it enters ecosystems, and why it persists in the environment for decades. The section also introduces alternatives and global efforts to reduce plastic dependency.

Air quality plays a major role in both environmental stability and human health. Learners explore how emissions from transport, industries, and energy production contribute to air pollution. Attention is also given to how monitoring systems and policies aim to reduce harmful exposure.

Freshwater systems are essential for life, yet they face increasing pressure from pollution and overuse. This section explores groundwater, surface water, contamination risks, and conservation strategies. Learners also gain an understanding of how water systems are managed to ensure safety and sustainability.

Sustainability brings together all environmental principles into long-term thinking and action. Learners explore how responsible resource use, pollution control, and conservation strategies help maintain ecological balance. The focus shifts toward building systems that support both human needs and environmental protection for future generations.