Paragraph A is a better conclusion to the essay title. 

In paragraph A, the conclusion directly addresses the essay's focus on the individual's role in protecting the environment. It provides specific actions that individuals can take, such as recycling, maintaining vehicles properly, and advocating for supportive laws. The conclusion emphasizes the collective effort of individuals in ensuring a better environment for future generations.

On the other hand, paragraph B delves into specific issues related to vehicle use but does not directly tie back to the overarching theme of the individual's role in environmental protection. While it does mention actions individuals can take, such as using public transport and getting cars serviced regularly, it lacks the comprehensive overview provided in paragraph A.

Overall, paragraph A is more focused, succinct, and directly addresses the essay's central theme, making it a better conclusion.