Scientists at Mexico's disaster prevention monitor volcano

<p>Scientists at Mexico&#39;s disaster prevention center monitor the Popocatepetl volcano, after the country raised the warning level for the volcano to one step shy of a red alert after it repeatedly spewed ash, smoke and lava into the air.&nbsp;</p><p><img src="https://imedia-peoplesdaily.pdnews.cn/up/cms/www/201903/29121129iryh.jpg" title="AFP-TV_20190329_DIS_MEX_AlertEnvironment_VID1324946_EN_en.jpg" alt="AFP-TV_20190329_DIS_MEX_AlertEnvironment_VID1324946_EN_en.jpg"/></p><p><span style="color: rgb(127, 127, 127);">Video source: AFP</span></p>