Talk:Gasbus - health impacts of Helsinki bus traffic

Suggestions of different groups for issue framing

Päivi Meriläinen, Matteo Prandi, Antonio Gasparrini, Pauliina Ahtoniemi

Scope

Purpose

To compare PM2.5 induced mortality in alternative public bus-transportation strategies as being considered by the Helsinki Metropolitan area.

Boundaries

• area: Helsinki Metropolitan area, Finland
• population: whole population in Helsinki area (1 million)
• primary PM2.5
• time period: Based on data 1996-1997, projected to year 2020
• Public Health effects: Mortality due to cardiopulmonary diseases, lung cancer and other non-accidental causes (?)
• Bus traffic tail-pipe emissions
• different ratio between the technologies
• fuel

Scenarios

1. Business as usual (current bus fleet)
2. All buses converted to modern diesel (EURO3-STD)
3. All buses converted to diesel with particle traps
4. All buses converted to natural gas buses

Intended users

• Helsinki Metropolitan area council
• Finnish government (e.g. Finnish ministry of social affairs and health)
• Scientific community
• Decision makers at local community level

Participants

• Scientists: KTL, YTV, Joint Research Centre @ European Commission

Definition

Variables

• Decision variable: Which bus engine?
  • includes emissions from different engine types
• PM2.5 emission from bus traffic
• PM2.5 concentration of bus traffic in Helsinki area (= exposure and intake estimate)
  • data: total conc. of PM2.5 exposure in Helsinki
• constant: Bus traffic intensity (if it remains the same)
• Dose-response
  • slope uncertain à variable
  • background mortality included as a constant
• human behavior (if data available)
• Health impact à mortality rate

Excluded variables

How to read discussions

Fact discussion: .
Opening statement: Closing statement: Resolution not yet found. (A closing statement, when resolved, should be updated to the main page.)
Argumentation: ←--#1:: . For A, B, C: We are not interested in non-bus-derived emissions. --Jouni 23:11, 18 February 2008 (EET) (type: truth; paradigms: science: defence) ←--#2:: . For D, E: We don't need exposure or intake, because we have a concentration-response function, not an exposure-response or dose-response function. --Jouni 23:11, 18 February 2008 (EET) (type: truth; paradigms: science: defence)