Your disease ecology team wants to assess risk factors for flea-borne typhus in Los Angeles County, California. You collect data on positive and negative humans in the area. Individual-level data are grouped to city limits within Los Angeles County. Demographic data and satellite imaging is used to explore potential risk factors (e. g., Is the average age of city population associated with flea-borne typhus cases?). After analyzing the data, a team member concludes that having more trees in a city increases the number of cases reported for that city. Do you agree or disagree with this statement? Please explain why.