Transportation Emissions
Introduction
Transportation emissions refer to the greenhouse gases and pollutants released into the atmosphere as a result of various modes of transportation, including automobiles, trucks, airplanes, trains, and ships. These emissions primarily consist of carbon dioxide (CO₂), nitrogen oxides (NOx), particulate matter (PM), and volatile organic compounds (VOCs). Transportation is a significant contributor to global greenhouse gas emissions, impacting air quality, human health, and climate change.
Key Points on Transportation Emissions
Sources of Transportation Emissions
Transportation emissions can be categorized based on the mode of transport:
Road Transportation: Cars, trucks, and buses are major contributors to transportation emissions. Gasoline and diesel combustion in internal combustion engines releases a substantial amount of CO₂ and other pollutants.
Aviation: Aircraft emissions occur at high altitudes and include CO₂, NOx, and water vapor. The aviation sector contributes a significant portion of global transportation emissions.
Maritime Shipping: Ships burn heavy fuel oil, resulting in high emissions of CO₂, sulfur oxides (SOx), and nitrogen oxides. International shipping is a major source of global transportation emissions.
Rail Transport: While trains are generally more fuel-efficient than road vehicles, emissions from diesel locomotives can contribute to air pollution and greenhouse gas emissions.