Sustainability: overview of SQA National 5 Environmental Science Area 3
An overview of the Sustainability area of SQA National 5 Environmental Science, covering renewable and non-renewable energy, sustainable food production, waste management and recycling, and sustainable development and environmental management, with study tips and links to each key area.
Reviewed by: AI editorial process; not yet individually human-reviewed
Sustainability is the third of the three areas of SQA National 5 Environmental Science. It asks how people can meet their needs for energy, food and resources, and deal with their waste, without exhausting resources or damaging the environment for future generations. This page maps the key areas and shows how they connect.
The four key areas
- Renewable and non-renewable energy
- The difference between renewable and non-renewable resources, fossil fuels and nuclear power, the main renewable sources, and the advantages and disadvantages of each for sustainability.
- Sustainable food production
- The environmental impacts of intensive farming, methods that make food production more sustainable, land use, and the challenge of feeding a growing population.
- Waste management and recycling
- The waste hierarchy of reduce, reuse and recycle, methods of disposal such as landfill and incineration and their impacts, composting, and pollution from waste such as plastics.
- Sustainable development and management
- The meaning of sustainable development, the ecological footprint, sustainable management of resources, balancing economic, social and environmental needs, and evaluating environmental decisions.
How to study Sustainability
- Learn the key definitions. Sustainable development, renewable, non-renewable, ecological footprint and the waste hierarchy are all examined and rewarded for precise wording.
- Be able to weigh both sides. Most marks come from advantages and disadvantages, not one-sided answers.
- Practise decision questions. Use the economic, social and environmental pillars to evaluate a proposal and then reach a justified conclusion.
- Link to the rest of the course. Energy connects to climate change, food to soil and biodiversity, and waste to pollution and the nutrient cycle.
For the official course specification
The SQA (now Qualifications Scotland) publishes the full National 5 Environmental Science course specification, specimen and past papers, and marking instructions at sqa.org.uk. Always revise from the current specification and SQA past papers.