example -
Code:
CSS:
p {whatever styling you want for normal paragraphs}
div.morespace p {margin-top:2em}
HTML:
<body>
<p>This is a normal paragraph.</p>
<p>This is a normal paragraph.</p>
<p>This is a normal paragraph.</p>
<p>This is a normal paragraph.</p>
<div class="morespace">
<p>This is a paragraph with more space.</p>
<p>This is a paragraph with more space.</p>
<p>This is a paragraph with more space.</p>
</div>
<p>This is a normal paragraph.</p>
<p>This is a normal paragraph.</p>
<p>This is a normal paragraph.</p>
<p>This is a normal paragraph.</p>
</body>