Engineering and society

Engineering shapes how people live: where they can live, what they breathe and drink, how they travel, how much their energy costs and what kind of world their grandchildren inherit. That influence brings responsibilities beyond making a design work. APEGA's first rule of conduct asks engineers to hold the public's health, safety and welfare paramount and to have regard for the environment. Meeting that standard today means thinking about sustainability, climate, communities, Indigenous rights, equity and new technologies such as artificial intelligence.

This chapter looks at those wider responsibilities: sustainable development and life-cycle thinking, energy and climate, engaging with communities and Indigenous peoples, diversity in the profession, communicating risk to the public, and the ethics of emerging technology. These are not soft extras; they increasingly decide whether projects are approved, funded and trusted.

Sustainable development

The most widely used definition comes from the 1987 Brundtland Report of the United Nations World Commission on Environment and Development: sustainable development "meets the needs of the present without compromising the ability of future generations to meet their own needs". Engineers often put it in terms of three pillars, sometimes called the triple bottom line:

• Environmental: protecting air, water, land, ecosystems and the climate.
• Social: health, safety, equity, community well-being and respect for rights.
• Economic: affordability and value over the whole life of a project, not just its first cost.

Engineers Canada publishes a national guideline on sustainable development and environmental stewardship, and regulators increasingly expect engineers to consider environmental and social impacts as part of competent practice.

Life-cycle thinking

A design's impacts are not limited to the time it is in use. Life-cycle assessment (LCA) accounts for energy use, emissions and other impacts at every stage, from extracting raw materials to manufacturing, transport, use and end of life. Life-cycle costing does the same for money.

Energy and climate

Climate change is the defining engineering challenge of this century. Under the Canadian Net-Zero Emissions Accountability Act (2021), Canada has committed in law to net-zero greenhouse gas emissions by 2050, with interim targets such as a 40% to 45% reduction below 2005 levels by 2030. Whatever one's views on climate policy, these targets shape the work engineers do: electrification, grid modernization, renewable and nuclear generation, carbon capture and storage, hydrogen, efficient buildings, low-carbon materials and adaptation of infrastructure to more extreme weather.

Two kinds of engineering response are needed:

• Mitigation: reducing emissions, through efficiency, fuel switching, cleaner processes and capturing CO₂.
• Adaptation: designing for the climate that is coming, with larger storm sewers and culverts, flood protection, wildfire-resistant communities, and design loads that account for hotter summers and changing snow, rain and wind.

In Alberta, where energy is the largest industry, engineers work across the whole range: making oil and gas production cleaner, building carbon capture and storage projects, connecting wind and solar farms to the grid, and developing geothermal, hydrogen and petrochemical projects.

Communities and Indigenous peoples

Major projects such as pipelines, transmission lines, mines, dams and highways affect people who did not ask for them. Projects that ignore those people are delayed, challenged in court, or cancelled; projects that listen early often end up better designed. Engineers play a growing part in consultation: explaining options clearly, answering technical questions honestly, and changing designs in response to what they learn.

Indigenous peoples have constitutionally protected rights. Section 35 of the Constitution Act, 1982 recognizes and affirms existing Aboriginal and treaty rights, and the courts have established that the Crown (government) has a duty to consult, and where appropriate accommodate, Indigenous communities when its decisions could adversely affect those rights. Governments often delegate procedural parts of consultation to project proponents. Federally, the United Nations Declaration on the Rights of Indigenous Peoples Act (2021) commits Canada to aligning its laws with the Declaration, including the principle of free, prior and informed consent. The Truth and Reconciliation Commission's Call to Action 92 asks the corporate sector to build respectful relationships, provide equitable access to jobs and training, and educate staff about Indigenous history and rights.

For engineers this means understanding whose land a project is on, involving communities early rather than after the design is fixed, respecting Indigenous knowledge alongside technical data (for example, long-term observations of rivers, wildlife and ice), and supporting real economic participation through employment, contracting and equity ownership. INDG-101 in the Arts stream covers this history in more depth.

A profession that reflects the public

The profession serves everyone, and decisions are better when the people making them bring different experiences and perspectives. Engineering in Canada is still far from reflecting the population. In 2024, women made up 15.8% of Engineers Canada's membership and 21.0% of newly licensed engineers. Engineers Canada and the regulators have a goal called 30 by 30: raising the share of newly licensed engineers who are women to 30% by 2030. Indigenous peoples, racialized engineers and internationally educated engineers are also under-represented in parts of the profession.

Inclusion is also a design issue. Products designed by and tested on a narrow group can fail everyone else: crash-test dummies modelled on average men, voice recognition that struggles with accents, buildings that are hard to use for people with disabilities. Universal design, the idea that environments should be usable by as many people as possible without adaptation, is good engineering.

Engineers and the public

Communicating risk

Engineers are often asked whether something is safe. The honest answer is rarely yes or no; it is a statement about risk. People do not judge risk the way a calculation does: they accept far higher risks that are voluntary, familiar or under their own control (driving, skiing) than risks imposed on them, unfamiliar or catastrophic in nature (a nearby chemical plant, a nuclear facility). Neither view is simply right or wrong. Good communication explains what is known and unknown, compares risks fairly, takes concerns seriously, and never overstates certainty.

Public service

Engineers serve the public directly in government, municipalities and regulators, and indirectly by volunteering: as expert witnesses, on standards committees, in schools and through organizations such as Engineers Without Borders Canada, which works on infrastructure and economic development. The profession's self-regulation also depends on members volunteering to sit on councils, examination boards and discipline panels.

Technology, data and AI

Engineers increasingly design systems that collect data, make decisions automatically, or use machine learning: smart grids, autonomous vehicles, medical devices, industrial control systems and predictive maintenance tools. These bring new ethical questions alongside the old ones:

• Safety: can a learning system be verified, and how does it behave in situations it was not trained on?
• Privacy and security: what data is collected, who can see it, and how is it protected from attack? Cyberattacks on industrial controls are now a real safety hazard.
• Fairness: does the system work equally well for everyone, or does it embed biases from its training data?
• Accountability: who is responsible when an automated decision causes harm? For engineers, the answer remains: the professional who authenticated the design.

The code of ethics applies unchanged. Engineers must work within their competence, be honest about a system's limits, protect the public, and keep a human accountable. Using AI tools in your own work, such as writing code, drafting reports or checking calculations, follows the same rule: you are responsible for verifying everything you sign.