You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allfileusages gafcontinue="Boards.jpg|260" />
  </query-continue>
  <query>
    <pages>
      <page pageid="38" ns="0" title="Basin-Indians Wildfire in California&#039;s Central Coast Region" />
      <page pageid="514" ns="0" title="TMDL for Nutrients in Lower Salinas River Watershed, Monterey County, California" />
      <page pageid="820" ns="0" title="Sudden Oak Death (SOD)" />
      <page pageid="1129" ns="0" title="Big Sur Land Trust (BSLT)" />
      <page pageid="1143" ns="0" title="Carmel River Floodplain Restoration and Environmental Enhancement (Carmel River FREE) Project" />
      <page pageid="1450" ns="0" title="Big Sur Region" />
      <page pageid="1642" ns="0" title="Monterey Bay Air Resources District" />
      <page pageid="1701" ns="0" title="Wildlife Connectivity in California&#039;s Central Coast Region" />
      <page pageid="1768" ns="0" title="Backcountry Hunters and Anglers" />
    </pages>
  </query>
</api>