The world was slowly starting to change as more and more people embraced cycling. With fewer cars on the road, the air was cleaner and the environment was starting to heal. And with the help of the aliens, the people of Earth were able to rebuild their cities in a way that was sustainable and bike-friendly.

They started to create more green spaces and parks, where people could go for a ride and enjoy nature. They also built more bike racks and storage areas, so that people could safely park their bikes while they were running errands or at work.

As the cities became more bike-friendly, the people of Earth began to realize that they didn't need cars as much as they thought they did. They started to walk or cycle to work, school, and other places, and it made their lives better in many ways.

They had more time to enjoy the outdoors, they saved money on gas and parking, and they felt more connected to their community. And as they became more active and healthier, they also felt happier and more fulfilled.

The world had been through a disaster, but the people of Earth had learned an important lesson. They realized that they could create a better world for themselves and for future generations by working together and embracing a new way of life. With the help of the aliens, they had rebuilt their world in a way that was sustainable, healthy, and fun.