Billion people invited to switch off lights

Around a billion people living in the world's major cities are being invited to turn off their lights at 8:30 p.m. local time on Saturday for "Earth Hour," described as the biggest mass campaign to demand action on climate change.

If you want to include this story in your blog, copy and paste this formatted text:

<p><a href="http://www.physorg.com/news157289176.html">Billion people invited to switch off lights</a></p> <p>Around a billion people living in the world's major cities are being invited to turn off their lights at 8:30 p.m. local time on Saturday for "Earth Hour," described as the biggest mass campaign to demand action on climate change.</p>