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<!DOCTYPE html>
<html dir="ltr" lang="fr" class="ltr fr no-js">
<head>
	<script type='text/javascript'>/*<![CDATA[*/(function(H){H.className=H.className.replace(/\bno-js\b/,'js')})(document.documentElement);/*]]>*/</script>
	<title>ppm - Quel futur pour l'humanité ?</title>
	<meta name="description" content="partie par million" />
	<link rel="canonical" href="https://quelfutur.org/+-ppm-+" />
	<?php echo recuperer_fond( 'inclure/head', array('lang' => 'fr'), array("compil"=>array('squelettes-dist/mot.html','html_8ee414a831e3a3c01a042073a2a09ed2','',9,$GLOBALS['spip_lang'])), _request('connect') ?? '');
?>
	
	<link rel="alternate" type="application/rss+xml" title="ppm " href="spip.php?page=backend&amp;id_mot=7" />
</head>

<body class="pas_surlignable page_mot">
<div class="page">

	<?php echo recuperer_fond( 'inclure/header', array('lang' => 'fr'), array("compil"=>array('squelettes-dist/mot.html','html_8ee414a831e3a3c01a042073a2a09ed2','',17,$GLOBALS['spip_lang'])), _request('connect') ?? '');
?>
	<?php echo recuperer_fond( 'inclure/nav', array_merge(array (
  'id_mot' => '7',
  'type-page' => 'mot',
  'date' => '2026-09-01 09:42:17',
  'date_default' => true,
  'date_redac' => '2026-09-01 09:42:17',
  'date_redac_default' => true,
),array('lang' => 'fr')), array("compil"=>array('squelettes-dist/mot.html','html_8ee414a831e3a3c01a042073a2a09ed2','',18,$GLOBALS['spip_lang'])), _request('connect') ?? '');
?>

	<main class="main" role="main">
		
		<div class="wrapper">
		<div class="content" id="content">
			<p class="arbo"><a href="https://quelfutur.org/">Accueil</a> &gt; Mots-clés &gt; Glossaire &gt; <strong class="on">ppm</strong></p>
	
			<div class="cartouche">
				
				<h1 class="surlignable">ppm
</h1>
			</div>
	
			<div class="texte"><p>La <a href="https://fr.wikipedia.org/wiki/partie_par_million" class="spip_glossaire" rel="external">partie par million</a> (ppm) est une unité sans dimension fréquemment utilisée par les scientifiques. Pour un gaz, 1&nbsp;ppm représente une concentration de 1&nbsp;cm<sup>3</sup> par m<sup>3</sup>.</p></div>
	
			
			
	
			
			
	
			
			
	
			
			
	
			
			
	
			
	
		</div><!--.content-->
		</div><!--.wrapper-->
	
		<aside class="aside" role="complementary">
	
			<?php echo recuperer_fond( 'inclure/navsub', array('lang' => 'fr'), array("compil"=>array('squelettes-dist/mot.html','html_8ee414a831e3a3c01a042073a2a09ed2','',55,$GLOBALS['spip_lang'])), _request('connect') ?? '');
?>
			<?php
include_once("./" . _DIR_RACINE . "ecrire/balise/formulaire_.php");
if ($lang_select = "fr") $lang_select = lang_select($lang_select);
inserer_balise_dynamique(balise_FORMULAIRE__dyn('FORMULAIRE_RECHERCHE'), array('squelettes-dist/mot.html', 'html_8ee414a831e3a3c01a042073a2a09ed2', '_principale', 56, 'fr'));
if ($lang_select) lang_select();
?>
			
			
			
			<div class="menu">
				<a id='pagination_mots_freres' class='pagination_ancre'></a>
				<h2>Mots-clés dans le même groupe</h2>
				<ul>
					
					<li><a href="+-Energie-primaire-Energie-finale-+">Énergie primaire / Énergie finale
</a></li>
					
					<li><a href="+-EROEI-EROI-9-+">EROEI / EROI
</a></li>
					
					<li><a href="+-Exergie-+">Exergie
</a></li>
					
					<li><a href="+-GES-GHG-+">GES / GHG
</a></li>
					
					<li><a href="+-GIEC-IPCC-+">GIEC / IPCC
</a></li>
					
					<li><a href="+-kep-+">kep
</a></li>
					
					<li><a href="+-OMM-WMO-+">OMM / WMO
</a></li>
					
					<li><a href="+-PIB-GDP-+">PIB</a></li>
					
					<li><a href="+-PNUE-UNEP-+">PNUE / UNEP
</a></li>
					
					<li><a href="+-ppm-+" class="on">ppm
</a></li>
					
				</ul>
				
			</div>
			
	
			
			
			<div class="menu">
				<h2>Autres groupes de mots-clés</h2>
				<ul>
					
					
					<li><a href="+-Capitalisme-+">Parties prenantes
</a></li>
					
					
					
					<li><a href="+-Comptabilite-energie-+">Thèmes
</a></li>
					
					
				</ul>
			</div>
			
			
		</aside><!--.aside-->
	</main><!--.main-->

	<?php echo recuperer_fond( 'inclure/footer', array_merge(array (
  'id_mot' => '7',
  'type-page' => 'mot',
  'date' => '2026-09-01 09:42:17',
  'date_default' => true,
  'date_redac' => '2026-09-01 09:42:17',
  'date_redac_default' => true,
),array('self' => '+-ppm-+',
	'lang' => 'fr')), array("compil"=>array('squelettes-dist/mot.html','html_8ee414a831e3a3c01a042073a2a09ed2','',67,$GLOBALS['spip_lang'])), _request('connect') ?? '');
?>

</div><!--.page-->
</body>
</html>

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