Diesel-powered trucks emit significant amounts of particulate matter, nitrogen oxides, and other pollutants, contributing to air pollution in urban environments.

Vehicle exhaust emissions, particularly from cars, trucks, and buses, are the main source of air pollution from transportation, releasing pollutants such as carbon monoxide, nitrogen oxides, and hydrocarbons.

Sulfur dioxide is primarily emitted by industrial activities and power plants, not by vehicles.

Photochemical smog is formed when sunlight reacts with nitrogen oxides and hydrocarbons emitted by vehicles, leading to the production of ozone and other pollutants.

Electric vehicles produce zero tailpipe emissions, significantly reducing air pollution compared to conventional gasoline-powered vehicles.

Emissions control refers to the strategies and technologies used to reduce the release of pollutants from transportation sources, such as catalytic converters and particulate filters.

Increasing the use of diesel-powered vehicles would lead to higher emissions of air pollutants, counteracting efforts to reduce air pollution.

Carbon dioxide is the main greenhouse gas emitted by transportation activities, primarily due to the combustion of fossil fuels in vehicles.

Trains generally have a lower carbon footprint compared to other transportation modes due to their energy efficiency and ability to transport large numbers of people.

Sustainable transportation encompasses a range of strategies and technologies aimed at reducing the environmental impact of transportation, including air pollution and greenhouse gas emissions.

Carbon pricing, vehicle emissions standards, and fuel economy standards are all policies that aim to reduce air pollution from transportation by incentivizing the adoption of cleaner technologies and practices.

Congestion pricing is a strategy to reduce traffic congestion and air pollution by charging drivers a fee for using roads during peak traffic hours.

Public transportation, such as buses and trains, can reduce air pollution in dense urban areas by reducing the number of vehicles on the road and promoting energy-efficient transportation.

Transit-oriented development is a planning approach that aims to create walkable, bikeable, and transit-friendly neighborhoods centered around public transportation hubs.

Selective catalytic reduction (SCR) is a technology used to reduce nitrogen oxide emissions from diesel engines by injecting a reducing agent, such as urea, into the exhaust stream.