Question

which of the following can cause an increase in a persons carbon footprint?
riding a bike
walking
recycling
riding in an airplane

Explanation:

Riding a bike, walking, and recycling are eco - friendly activities that reduce or have a low impact on carbon emissions. Airplanes consume large amounts of fossil fuels during flight, resulting in significant carbon dioxide emissions, thus increasing a person's carbon footprint.

Answer:

D. Riding in an Airplane