This may be of interest:
Public Health is now offering an opportunity for open access publishing and for authors who select to publish Open Access, read and download here.
On behalf of the Royal Society for Public Health, Public Health published original papers, reviews and short reports on all aspects of the science, philosophy, and practice of public health and if of interest to academics and practitioners in public health.
Some examples of open access articles relevant to environmental health include:
Reis et al (2013) Integrating health and environmental impact analysis
Tannahill and Kelly (2013) Layers of complexity in interpreting evidence on effectiveness
And there are many more besides.