Final answer:
The largest source of greenhouse gas emissions in the United States is transportation, specifically from the use of cars, trucks, and minivans, which accounted for 28.2% of emissions in 2018.
Step-by-step explanation:
Largest Source of Greenhouse Gas Emissions in the US:
The largest source of greenhouse gas emissions in the US is transportation. In 2018, transportation was responsible for 28.2 percent of all US emissions, more than any other sector, with a significant part coming from passenger vehicles. While energy production is the second-largest source, accounting for 26.9 percent, and agriculture contributes significantly too, transportation still holds the lead.
The consumption of fossil fuels for transportation purposes such as cars, trucks, and minivans creates a considerable amount of emissions, while other sectors like industrial production and agriculture also have substantial emissions. As noted in EPA reports from 2020, passenger cars and light-duty trucks are the major culprits, leading to mitigation priorities that include the development and use of less carbon-intensive fuels, renewed focus on fuel efficiency, and reduction of travel through improved urban planning and alternative commuting options like telecommuting.