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<!DOCTYPE html>
<html>
<head>
<style>
p::first-line {
    background-color: yellow;
}
</style>
</head>
<body>

<h1>WWF's Mission Statement</h1>
<p>To stop the degradation of the planet's natural environment and to build a future in which humans live in harmony with nature, by; conserving the world's biological diversity, ensuring that the use of renewable natural resources is sustainable, and promoting the reduction of pollution and wasteful consumption.</p>

<p><b>Note:</b> For this selector to work in IE 5.5-8, you must specify the old, single-colon CSS2 syntax (:first-line instead of ::first-line).</p>

</body>
</html>