map showing signatories of the Convention on Long-Range Transboundary Air Pollution
<a href="//commons.wikimedia.org/wiki/User:AndrewRT" title="User:AndrewRT">AndrewRT</a>
self-made based on <a href="//commons.wikimedia.org/wiki/File:BlankMap-World6.svg" class="mw-redirect" title="File:BlankMap-World6.svg">Image:BlankMap-World6.svg</a>