the CO2 emissions relate purely to fuel use. the average passengers per bus is 9.2 (from 5.2 billion vehicle km and 48 billion passenger km) the average CO2 emission for the buses is 822 g / km.
Do buses pollute more than cars?
The more passengers that are riding a bus or train, the lower the emissions per passenger mile. For in- stance, U.S. bus transit, which has about a quarter (28%) of its seats occupied on average, emits an es- timated 33% lower greenhouse gas emissions per passenger mile than the average U.S. single occu- pancy vehicle.
Are buses bad for the environment?
The vast majority of school buses are fueled by diesel, and therefore do create diesel exhaust. … As for the environment, these particles emitted from diesel exhaust contribute to the production of smog, acid rain, and other air pollution. The emissions can be harmful to plants, animals, crops and water.
How much CO2 does a bus release?
Car emissions per passenger km in 2017-18 were 154.5g/pkm, while bus was 79.0g/pkm and aviation 127.2g/pkm.
How much CO2 does a bus produce per mile?
In a study published last year, the Union of Concerned Scientists reported that while the average 40-foot diesel bus emits 2,680 grams of CO2 per mile (g/mi), an electric bus charged on the average U.S. energy mix emits 1,078 g/mi, roughly a 50% reduction.
What is the biggest contributor to climate change?
Among the various long-lived greenhouse gases (GHGs) emitted by human activities, CO2 is so far the largest contributor to climate change, and, if anything, its relative role is expected to increase in the future.
Do buses emit less CO2 than cars?
A coach ride produces lower emissions still. Taking the local bus currently emits more, perhaps because the vehicles travel at lower speeds and pull over more often. But taking a local bus emits a little over half the greenhouse gases of a single occupancy car journey and also help to remove congestion from the roads.
What pollutants do buses emit?
Reducing Air Pollution Exposure in Passenger Vehicles and School Buses (2015) Exposures to vehicle-emitted PM2. 5, black carbon (BC), and ultrafine particles (UFPs), have been associated with adverse health effects.
How much pollution does a school bus produce?
According to reason.org, yellow school buses produce 14 pounds of carbon dioxide every 100 miles it travels. Green buses, also known as EV buses, eliminate the amount of carbon dioxide released, and will also reduce fuel cost.
How does transportation contribute to pollution?
Passenger vehicles are a major pollution contributor, producing significant amounts of nitrogen oxides, carbon monoxide, and other pollution. In 2013, transportation contributed more than half of the carbon monoxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air.
How many cars equal a bus?
Buses can carry up to around 50 passengers; since most passengers are travelling alone or with only one other person, that bus could replace around 30-40 cars. Imagine the traffic with all those cars!
Are buses greener than cars?
According to figures from the US Department of Energy, a bus with average occupancy (9 people) is more polluting than a car with average occupancy (1.57 people). … It is true that full buses and trains are significantly less polluting per passenger than cars (even cars full of passengers).
How are bus emissions calculated?
Divide the number of miles in a particular trip by the mileage to determine the gallons of gas used. Multiply this number by 8.8 to find out the bus’s carbon emissions for a trip of that length.
Why is taking the bus better for the environment?
Public transportation inherently benefits the environment because it reduces the number of people driving single occupancy vehicles. By increasing ridership on public transit, more fuel is conserved, air pollution decreases, and the region’s carbon footprint is reduced.
Why does transportation contribute to carbon emissions?
Greenhouse gas emissions from transportation primarily come from burning fossil fuel for our cars, trucks, ships, trains, and planes. Over 90 percent of the fuel used for transportation is petroleum based, which includes primarily gasoline and diesel.
How much CO2 do diesel buses emit?
According to the results of the study, on average, diesel buses consumed 11.8±2.6 million joules per 100 km and emitted 871±198 g CO2 equivalent per kilometer. The natural gas buses, on average, consumed 16.1 ± 4.9 million joules per 100 km and emitted 932 ± 234 g CO2 equivalent per kilometer.