span> <span class="op">&lt;-</span> <span class="fu"><a href="reference/emission.html">emission</a></span><span class="op">(</span>total <span class="op">=</span> <span class="va">TOTAL</span>,</span>
<span>                         pol   <span class="op">=</span> <span class="st">"CO"</span>,</span>
<span>                         area  <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/list.html" class="external-link">list</a></span><span class="op">(</span>SP <span class="op">=</spa