True or false: Propane can displace oxygen needed to sustain life.

Propane is classified as a hydrocarbon and is used as a fuel for heating, cooking, and in various industrial applications. In certain circumstances, notably when it is leaked in enclosed spaces, propane can displace oxygen in the air. Since propane is denser than air, it can accumulate at lower levels, reducing the amount of available oxygen needed for human life. This can lead to asphyxiation in situations where ventilation is poor. Thus, the statement regarding propane's ability to displace oxygen is true, as this characteristic poses a risk in specific environments, particularly during leaks or in confined spaces where proper ventilation is not available.