Here are the biggest ways Americans can change their transportation habits to reduce carbon emissions

At the end of last year, the United Nations adopted the "Paris Agreement" to curb global greenhouse gas emissions, urging each nation to do its part to curb climate change.

Michael Sivak and Brandon Schoettle of the Transportation Research Institute at the University of Michigan recently published a paper detailing ways in which every single American can contribute to cutting back on emissions.

Unsurprisingly, many of those ways involved the ways in which we get around.

According to the EPA, transportation accounts for 27% of all American emissions, which is why it has the largest potential when it comes to cutting.

Here are some of the best ways to start.