• Energy Research
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Introduction The momentum towards the green economy; strongly focused on innovation; highlights the urgent need to anticipate the new and emerging health and safety risks in green jobs with a view to ensuring adequate; safe and healthy working conditions. The present study has conducted a survey among relevant stakeholders; social partners; institutions and green companies to collect their perceptions of potential effects of green jobs on occupational health and safety; with particular regard to the renewable energy sector. Methods An online questionnaire posted on the "Research Activity" section of the INAIL website was used to conduct the survey. It involved a sample of 61 stakeholders including institutions (11); trade unions (11); employers associations (13); companies (11); research (15). Questionnaire results have been uploaded to a database in Microsoft Excel format and analysed using SPSS version 16.0 for Windows. Results Most of respondents claim that the green transition poses new risks that can be managed with current risk management procedures (38;2% of responses) or think that renewables entail the same types of risks as other forms of energy but new risk management procedures are required (27;3% of responses). As regards the occupational health and safety risks associated with the production of sustainable energy sources; this study shows that wind; photovoltaic and solar thermal energy (41;2%) entail low health and safety risks. Medium risks have been identified in geothermal (47;1%); hydro power (44;1%) and biomass (38;2%). Discussion This study provides an objective analysis of green experts' perception of emerging and poorly investigated issues concerning the potential implications of green technologies in the field of occupational health and safety. The poor perception of workers' health and safety protection brought to light by the survey is due to a delay of the Italian political; scientific and industrial world in the assessment of potential risks for workers' health and safety posed by the introduction of new green technologies.

The Istituto Superiore di Sanità (ISS, the National Institute of Health of Italy) and the Istituto dei Motori (IM) of the Consiglio Nazionale delle Ricerche (CNR, National Research Council) have carried out this study, jointly funded by the two institutes together with the Ministry of Environment. The chemical and toxicological characteristics of emissions from two urban bus engines were studied: a diesel engine fueled with both diesel oil and biodiesel blend and an equivalent spark-ignition one fuelled with compressed natural gas, operating in steady-state conditions. Regulated and unregulated pollutants, such as carcinogenic polycyclic aromatic hydrocarbons and nitrated derivatives, carbonyl compounds and light aromatic hydrocarbons were quantified. Mutagenicity of the emissions was evaluated by the Salmonella typhimurium/mammalian microsome assay. The effect of the fuels under study on the size distribution of particulate matter was also evaluated. The impact of diesel-powered transport on urban air quality, and the potential benefits for human health deriving from the use of natural gas for public transport, are discussed.