Cremation has become Canada's most common disposition choice, and for many environmentally conscious families, it feels like the obvious green option. It takes up no land. It leaves no casket, no vault, no permanent infrastructure. Compared to a conventional burial, the ecological logic seems clear. But the comparison that matters is not cremation versus conventional burial. It is cremation versus genuine green burial — and that comparison is less straightforward.
This article sets out the honest differences. Not to argue for one over the other — both are legitimate choices — but to give families the information they need to make a decision that actually reflects their values.
What Cremation Actually Involves
Cremation reduces the body to bone fragments through intense heat — typically between 760 and 980 degrees Celsius — over a period of two to three hours. In Canada, most crematoria are powered by natural gas. The process releases carbon dioxide, carbon monoxide, and, depending on the deceased's dental work or medical implants, potentially mercury and other trace compounds.
The carbon footprint of a single cremation is estimated at roughly 160–400 kilograms of CO₂ equivalent, depending on the equipment and fuel source. Some crematoria in Canada are transitioning to cleaner energy sources, which will reduce this figure over time. But at present, cremation is not a carbon-neutral process.
The ashes — properly called cremated remains or cremains — are not the body's minerals returned to the soil. The high heat transforms calcium phosphate into calcium silicate, which does not readily integrate with soil chemistry. Scattering ashes in large quantities in one location can actually alter soil pH and inhibit plant growth.
What Genuine Green Burial Involves
A true green burial uses no embalming chemicals, no concrete vault, and no non-biodegradable container. The body is returned directly to the soil, where it decomposes naturally — typically within one to five years, depending on soil conditions, depth, and climate.
The carbon that was sequestered in the body's tissues does eventually return to the atmosphere through decomposition, but this process is slow, distributed, and part of the natural carbon cycle in a way that combustion is not. More importantly, a well-managed green burial site — planted with native species, managed to support soil health and biodiversity — can become a net carbon sink over time.
No fuel is burned. No chemicals are introduced. The body feeds the land.
The question is not which option is less bad. It is which one actually gives something back.
Side by Side
| Factor | Green Burial | Cremation |
|---|---|---|
| Carbon footprint | Near zero; body decomposes naturally | 160–400 kg CO₂ equivalent per cremation |
| Land use | Requires a burial plot; land becomes habitat | No permanent plot required |
| Chemical inputs | None | Natural gas combustion; potential mercury release |
| Soil impact | Positive; returns nutrients to the ecosystem | Ashes can alter soil pH if scattered in volume |
| Cost in Canada | Often lower than conventional burial; comparable to or slightly above cremation | Generally the lowest-cost option |
| Availability | Limited; genuine sites are still rare in Canada | Widely available across Canada |
| Scattering options | Not applicable | Ashes can be kept, scattered, or incorporated into memorial products |
The Availability Problem
One honest reason many Canadian families choose cremation over green burial is simply that green burial sites are not easily accessible everywhere. If you live in rural Nova Scotia, or in Saskatchewan, or in many parts of Quebec, a genuine natural burial site may not exist within a reasonable distance. Cremation, by contrast, is available in virtually every Canadian community.
This is a real constraint, and it is worth naming. The ecological argument for green burial over cremation is strong — but only if a suitable site actually exists where you need it. The directory on this site is an attempt to make that geography visible, and it continues to grow as new sites open.
A Note on Aquamation
Aquamation — also called alkaline hydrolysis or water cremation — is an emerging alternative that uses water and potassium hydroxide rather than flame. It produces significantly lower emissions than flame cremation and returns a liquid effluent that can be safely discharged. As of 2025, aquamation is legal in several Canadian provinces and becoming more widely available. For families considering cremation on environmental grounds, it is worth exploring as an alternative to flame cremation.
What to Make of All This
If environmental impact is your primary criterion, genuine green burial — in a site that actively manages for ecological restoration — is the better choice, provided such a site is accessible to you. If accessibility, cost, or the desire to scatter remains are the primary factors, cremation remains a reasonable option, and aquamation is an increasingly available improvement on it.
What this comparison argues against is treating cremation as inherently green and conventional burial as inherently not. The real divide is between choices that give something back to the natural world and those that don't. Green burial, done well, is on one side of that divide. Everything else is a matter of degree.