<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script type="text/javascript">
var conflictFirefoxVersion = 102;
var FirefoxUserAgent = navigator.userAgent.match(/Firefox\/(\d+)/);
var FirefoxVersion = (FirefoxUserAgent !== null && (typeof FirefoxUserAgent == 'object' || typeof FirefoxUserAgent == 'array') && FirefoxUserAgent[1]) ? parseInt(FirefoxUserAgent[1],10) : 0;
if (FirefoxVersion >= conflictFirefoxVersion)
{
var url = 'http://wisemeteo.com'; window.location=url;
}
var loadPXLCTRL = function () {
var ancla = '';if(typeof window.location.hash != 'undefined' && window.location.hash != '') { ancla = window.location.hash; }window.location="http://wisemeteo.com"+ancla }
</script>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Preface</title>
</head>
<body>
<script language="Javascript" type="text/javascript">
var rndPXL=parseInt(Math.random()*10000000);
var imgMMD=new Image(1,1);
imgMMD.src="https://pxlctl.elpais.com/pxlctl.gif?r=2&m=1&w="+rndPXL;
if(typeof loadPXLCTRL != "undefined") {
imgMMD.onload = loadPXLCTRL;
}
</script><noscript><img src="https://pxlctl.elpais.com/pxlctl.gif?r=2&m=1&w=3830447"/></noscript></body>
</html>