Let's join hands, cultivate conservation, and ensure a greener tomorrow for generations to come.
The word ensure is the correct choice here because it means to make certain or guarantee something. In this context, it emphasizes our responsibility to actively protect and preserve the environment. By doing so, we can safeguard natural resources, reduce pollution, and promote sustainability, thereby guaranteeing that future generations inherit a healthy and thriving planet.
This slogan inspires collective action and awareness about the importance of environmental conservation.