How can I collect primary data for the environmental impacts of urban development in a local area?

There following are the ways in which you can collect primary data for the environmental impacts of urban development in a local area: You can interview the locals and ask them what changes are being or encountered by them since the activities pertaining to urban development have started. You can find and interview the groups of people who have had to move to a different place owing to the disturbance in living caused by urban development activities. You can try to get information from local environmentalists on how the animals in the area have got affected due to urban development.