<!-- We use tags to group research by topic -- browse below to see the most popular tags over the past month. -->
<p style="font-size:1.4em;">

<a class="badge badge-primary" href="/tag/air-quality">air-quality</a>
<a class="badge badge-primary" href="/tag/water-quality">water-quality</a>
<a class="badge badge-primary" href="/tag/soil">soil</a>
<a class="badge badge-primary" href="/tag/oil-and-gas">oil-and-gas</a>
<a class="badge badge-primary" href="/tag/climate">climate</a>
<a class="badge badge-primary" href="/tag/sensors">sensors</a>
<a class="badge badge-primary" href="/tag/organizing">organizing</a>

<a style="font-size:0.7em;" href="#" onClick="$('#more-tags').toggle()">more...</a>
</p>

<p style="font-size:1.4em;display:none;" id="more-tags">

<a class="badge badge-primary" href="/tag/agriculture">agriculture</a>
<a class="badge badge-primary" href="/tag/arduino">arduino</a>
<a class="badge badge-primary" href="/tag/balloon-mapping">balloon-mapping</a>
<a class="badge badge-primary" href="/tag/formaldehyde">formaldehyde</a>
<a class="badge badge-primary" href="/tag/games">games</a>
<a class="badge badge-primary" href="/tag/lead">lead</a>
<a class="badge badge-primary" href="/tag/legal">legal</a>
<a class="badge badge-primary" href="/tag/microplastics">microplastics</a>
<a class="badge badge-primary" href="/tag/mining">mining</a>
<a class="badge badge-primary" href="/tag/noise">noise</a>
<a class="badge badge-primary" href="/tag/oil">oil</a>
<a class="badge badge-primary" href="/tag/pm">particulate matter "pm"</a>
<a class="badge badge-primary" href="/tag/stormwater">stormwater</a>
<a class="badge badge-primary" href="/tag/timelapse">timelapse</a>
<a class="badge badge-primary" href="/tag/ui">user interface "ui"</a>
<a class="badge badge-primary" href="/tag/waste">waste</a>
</p>