Reduce Your Impact With Our Car Emissions Guide and Calculator

What kind of impact do you have on the environment?

According to the U.S. Environmental Protection Agency (EPA), a typical passenger vehicle emits 4.6 metric tons of carbon dioxide per year. One ton is equivalent to a balloon that’s about 30 feet in diameter, so if you were to visualize the metric tons emitted per person per year, picture a balloon 138 feet in diameter.

We created a car emissions calculator to help you understand how you’re directly impacting the environment and the gravity behind how it can affect your health. Learn more about your impact and what you can do to reduce your car emissions.

Why are car emissions detrimental to people and the environment?

The U.S. Energy Information Administration (EIA) reported that 28% of the U.S. energy consumption in 2018 was for transporting people and goods. That shows just how important and prevalent transportation is to daily life in the U.S. However, with 81% of energy in the U.S. derived from fossil fuels, transportation is majorly polluting our air. That’s where environmental and health concerns come in.

Acid rain

Exactly what it sounds like, acid rain is any form of precipitation that has acidic components. This can happen when vehicles emit sulfur dioxide (SO2) and nitrogen oxides (NOx), that are then transported by wind to mix with water before falling to the ground through precipitation. Acid rain is harmful to the environment because it can dissolve nutrients that plants need to be healthy and be deadly to aquatic life. Acid rain can also create miniscule particles that can get into your lungs, which can cause health problems or agitate existing ones.

Air pollution

Have you ever been behind a vehicle that created a huge puff of grey smoke? Now imagine that multiplied by the millions. Air pollution from vehicles can contribute to haze, which lowers visibility in cities and beyond. Car emissions can produce small particles that when hit by the sunlight, reduce clarity. These air pollutants can largely affect human health too. They can cause skin and eye irritation, respiratory problems and heighten pre-existing medical conditions. Air pollution has been linked to cancer, asthma, stroke, heart disease, diabetes, obesity and changes linked to dementia.

Climate change

We’ve heard it time and time again: We can’t ignore climate change. Yet, gas-powered vehicles contribute to the rise of the Earth’s temperature. Gasoline and diesel release greenhouse gases into the atmosphere. This warms the Earth’s atmosphere, ultimately changing the climate, which we’re already starting to experience.


Eutrophication describes a process when an increased amount of nutrients hits estuaries and coastal waters. The nutrient increase comes from a number of sources, but air pollution is a contributing factor. The increase of air pollution from vehicles can in turn, result in loss of species, grow other species, change habitats and more.

What contaminants are in car emissions?

Contaminants from car emissions are a massive contributor to air pollution. Here are some of the major substances that are being released into the atmosphere from gas-powered vehicles.

  • Carbon monoxide (CO): CO is an odorless, colorless and poisonous gas that is produced when fuel is burned, therefore cars emit it. It’s known to cause harm when confined to a small space like a garage or home, but it’s also harmful to the environment.
  • Hydrocarbons (HC): HC is an organic compound of hydrogen and carbon. It’s emitted from a vehicle to indicate unused fuel, which results from incomplete fuel combustion.
  • Nitrogen oxides (NOx): NOx is the reaction of nitrogen and oxygen. When HC and NOx combine in the sunlight, they produce ozone, which causes smog and respiratory problems.
  • Particulate matter (PM): PM are miniscule pieces in the air that can contribute to haze and cause health concerns.

Although much of car emissions are released into the atmosphere unseen, they don’t cause any less damage. In recent years, federal and state governments have been tackling reducing the emission of these contaminants with laws and regulations.

How are car emissions regulated?

Attempts to reduce car emissions is nothing new for the U.S. In fact, The Clean Air Act (CAA), established in 1970, is a comprehensive federal law that regulates air emissions from stationary and mobile sources. The law requires the Environmental Protection Agency (EPA) to regulate pollutants and pushes local and state governments to develop their own plans.

More recently, the EPA and the National Highway Traffic Safety Administration (NHTSA) established standards for greenhouse gas emissions and fuel economy for car manufacturers to follow. These standards restrict the emissions of the contaminants we mention above: CO, HC, NOx and PM. In conjunction with the standards set for manufacturers, the EPA and NHTSA made it easier for car buyers to understand fuel economy, fuel costs and the environmental impacts of every new car with a fuel economy label.

States have introduced their own regulations, too. California is known to be the strictest state on car emissions, complete with mandatory smog inspections. The program identifies cars with excess emissions and requires owners to get their cars repaired if they don’t pass.

Do electric and hybrid vehicles produce car emissions?

Electric vehicles (EV) and hybrid vehicles (HEV) produce much less emissions than conventional vehicles since their energy is sourced from electricity. Although EVs produce zero direct tailpipe emissions, emissions can be produced if the battery’s electrical power is originally sourced from a power plant.

There are also CO2 emissions involved in EVs through the manufacturing process. Recent studies show that the manufacturing of EVs actually produce more CO2 emissions than conventional vehicles due to the chemistry involved in producing the batteries. However, automakers are taking steps towards energy efficiency in manufacturing plants. In the end, EVs still pollute less over their lifespan than gas-powered vehicles.

Use our car emissions calculator to determine your impact

To manually determine your car’s emissions per trip, enter your vehicle’s miles per gallon (MPG), the miles you traveled and the fuel type your car uses. If you’re unsure of this information, select “Show Average Emissions,” which is based off of a car’s average MPG and the average size of a tank of gas. This is meant to show you on average, how much emissions is produced based on your mileage. We relied on information released by the U.S. Environmental Protection Agency (EPA) for these calculations.

Car Emissions Calculator

Fill out the following information to calculate your vehicle’s carbon footprint

Car Emissions Calculator


Source information can be found at:

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How can you reduce your car emissions?

The U.S. is on its way to cleaner air through the laws and regulations set by local, state and federal governments. By enforcing standards for manufacturers, introducing incentive programs for electric and hybrid vehicles, and educating communities on achieving cleaner air and slowing down global warming, we can reduce car emissions. Follow our tips for reducing your car emissions below.

It’s important to understand your car’s emissions so you know how much pollutants you’re producing. As we mentioned before, those pollutants are detrimental to your health and the environment so learning how to reduce them is key.

Sources: | NRCAN |

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