As negotiations for a global climate treaty heat up, this is our chance to send a strong and clear message urging the President of the US to lead the global efforts to tackle climate change.

Can you come to Prague this Sunday to attend Obama's public speech, and help deliver our message to him? We will be handing over 50 recyclable green hard hats to Avaaz members symbolising our call for a low-carbon, green-job future.

If you can join us, please send us an e-mail with your contact details to obamaprague@avaaz.org and reserve your green hard hat now. You will receive detailed instructions about when and where to collect the hats and gather before the event.

The speech will be delivered on Sunday, April 5 at 10:00 AM in Prague's Hradčanské náměstí. You can find information about the event and a map of the area at:

http://prague.usembassy.gov/obama.html

Right after the speech, at 12 am, EU and US green and development groups, including Oxfam International, Friends of the Earth, Greenpeace and WWF, will hold a public stunt in Central Prague, Klarov (we will send you further details) to call on EU and US leaders to kick off a new era for transatlantic action on climate change.