Some of our classes sentences.. still needs evidence to support the ideas

Look at the sentences below and see where you can find evidence for these ideas
The subject of urbanization’s problems has been researched for many years, but these problems still exist.

With urbanization more and more people live in cities, therefore there is heated competition for work.

The Green Party performed an important role, promoting the use of bicycles in London.

There is no doubt that traffic congestion has become an increasing concern for residents of most urban areas.

The Environmental Protection Organization is far sighted about the new measures of the urbanization. For example they want to introduce a new green water recycling system.