The forecasted air pollution-related transport tax revenue in Brazil shows a steady increase from 2024 to 2028, with values expressed as a percentage of GDP rising from 0.66% in 2024 and 2025 to 0.68% by 2028. This reflects a minimal annual growth signifying a stable revenue stream expected over this period. As there is no variation given over the last two years, it's primarily important to focus on the projected change, with a noticeable yet slight increase year on year.

Future trends to watch for:

Potential policy changes affecting transport and environmental taxation, possibly influencing the rate of revenue growth.
Evolving public transportation and clean vehicle technologies, which could alter patterns of tax revenue from traditional transport sectors.
Economic fluctuations and their impact on GDP and consequently on the percentage representation of tax revenues.