The forecast for Canada's air pollution-related transport tax revenue as a percentage of GDP shows a stable trend from 2024 to 2027 at 0.04%, with an anticipated increase to 0.05% by 2028. This implies minimal year-on-year variation, indicating steady revenue expectations over this period.

Future trends to watch for include:

Potential policy changes to tackle climate change which might increase these tax rates.
Technological advancements in transportation affecting emissions and subsequently altering tax revenues.
Fluctuations in economic growth influencing tax revenue as a percentage of GDP.