People can reduce the carbon footprints easily if we are always willing to give something up in our life. However, there is something we can't be without and require. I focus on the transportation in people's life.
First of all, we can't confront that we take the public transportation to everywhere we go. Public transportation could be not clean and unsafe. More people prefer to use private cars than public transportation and we can't really change it.
Secondly, for me, I am an international student for myself. And I need to take long airplane trips for many times per year because I need to come back and see my parents and friend there. And long airplane trips could lead to a huge contribution to the carbon footprints. Nevertheless, for me, it is unavoidable to do that.

I totally agree with you about transportation. It’s sometimes just impossible to not use cars or planes to travel. I know that many people travel long distances via plane to visit friends and family, and I know that they can see these friends and family members only once or twice every year. It’s the same with driving long distances; you have to do it so you can see the family members that you don’t get to visit with too often. The two things about transportation that everyone should control is how often they drive or fly long distances and if they can walk/bike to school/work. They should try to drive or fly long distances 2-3 times every year, which gives them a lot of time to visit with their friends and family, but also reduces their carbon footprint. If someone’s school/work is within reasonable walking/biking distance, then they should try to do so as much as possible not only to get some exercise, but also to reduce their carbon footprint. In short, it’s important to visit family far away, but people should be aware of how often they’re traveling long distances.