More than 150 countries have sent delegates to a meeting in Vienna aiming to extend and widen the UN Kyoto protocol on climate change. The meeting wants to engage non-governmental organizations as well as governments.

The talks are meant to prepare the way for a full on UN climate summit in December in Bali. In Bali a decision will probably take place on whether or not to follow up on, or continue with the Kyoto protocol after it expires in 2012.

Read more from the BBC