Refer to the two sources.

Source 1

"Improving job access continues to be one of the most important priorities for transportation planners, but policy-makers and researchers debate whether this goal is better served by investments in public transportation or increasing access to vehicles. In the analysis of a large-scale panel survey of families, it was found that improving automobile access decreases the likelihood of unemployment and increases earnings, but that—unsurprisingly—automobiles are also quite costly to own and maintain.”

A Longitudinal Analysis of Cars, Transit, and Employment Outcomes, by Michael J. Smart and Nicholas J. Klein, 2015

Source 2

A graph titled Ownership of Private Vehicles in Developed Countries, 1960 to 1995 shows countries on the x axis and ownership in millions on the y axis. The graph shows an upward trend in ownership for each country.

On a global scale, which of the following is most likely to occur based on the use of private vehicles to access suburban jobs?

Increased urbanization
Increased carbon emissions
Declining healthcare access
Declining economic opportunity

Both excepts show that using automobiles is very important in the world and is a very widespread practice. Most automobiles however, run on fossil fuels by combusting the fuels in the engine and then releasing the gaseous by-products a lot of which are carbon based.

With a higher number of cars therefore, there will be an increased amount of carbon emissions into the atmosphere which will contribute to global warming and its adverse effects by extension.