Aging and age-friendly communities
Air Quality and urban smog
City spotlight: Mexico City-gripped by a nagging air pollution problem
Chemical exposure
Expert community: environmental health surveillance
Climate change
City spotlight: Venice - will anything work to stop the flooding?
Crime and violence
City spotlight: New York City - an international model of criminal justice reform
Drugs and alcohol
Expert commentary: substance availability and abuse
Food quality and availability
Green buildings and sustainable development
City spotlight: Singapore - Proving densely populated cities can be both livable and sustainable
Green space and natural areas
City spotlight: Melbourne - the many benefits of more trees
Healthcare access and quality
City spotlight: Delhi - reforming the delivery of urban health services
Indoor air quality
Infectious diseases
City spotlight: Freetown - checking the spread of a deadly virus
Expert commentary: "One health" policies and practices
Light pollution
Noise pollution
Expert commentary: addressing noise pollution
Odor pollution
Population growth and overcrowding
City spotlight: Karachi - Glimmers of hope for the world's largest slum
Expert commentary: Immigrant health and safety
Radiation sources
Social support networks
Expert commentary: Social isolation among older adults
Solid waste management and recycling
City spotlight: Toronto - Green living made easy and fun
Stress management
Walkable and bike-friendly neighborhoods
City spotlight: Copenhagen - The city where bicycles rule
Water and sanitation
Workplace health and safety
Expert commentary: Worker health.