<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31344928</termId><termName>ozone layer</termName><termType>PT</termType><termNote><![CDATA[ Region of the upper atmosphere of the Earth containing a relatively high concentration of ozone, which absorbs much of the ultraviolet radiation reaching the earth from the sun. ]]></termNote><termCreatedDate>2026-03-30 20:33:02</termCreatedDate><relation><relationType>BT</relationType><termId>31320572</termId><termName>atmosphere</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>31375601</termId><termName>ozone hole</termName><termType>PT</termType></relation></term>  </Zthes>