One possible version：

Nowadays, the practice of carpooling is becoming more and more popular. From this picture, we can find many people are enthusiastic about carpooling for the following reasons. Firstly, it helps to reduce vehicle emissions and thus is environmentally friendly. Secondly, it is a practical way for each carpooler to reduce the huge paying burden of driving respectively. Thirdly, carpoolers can get to their destinations more quickly than before because there will be few traffic jams with few cars on the way. Besides their positive attitudes towards carpooling, from this picture, we can also find measures are usually taken to avoid possible negative problems caused by carpooling. For example, an agreement is signed before carpooling to ensure safety and clarify obligations.

In my personal opinion, carpooling between friends and relatives should be encouraged because it could relieve traffic pressure and make private cars more efficient. Meanwhile, carpooling between strangers should be properly guided. It's better for every carpooler to check others' credentials every time you carry out the practice.