The public demand for action on climate change is palpable this morning in Barcelona.

Today marks the beginning the final round of climate talks before December's UN climate summit in Copenhagen – the negotiators have one week to set the stage for the promised deal to stop climate chaos at the summit in December.

As we speak, 23 activists are taking action the Sagrada Familia, demanding world leaders to make the call and push the negotiators to act in Barcelona. While our climbers worked to deploy 3 banners at the Sagrada Familia, those of us not in harnesses joined our partners from TckTckTck to give negotiators a wake up call as they entered the conference center for beginning of the talks.

Hundreds of alarm clocks rang out simultaneously sounding the climate alarm for the negotiators - who seem to have fallen asleep at the wheel-to wake up, put their feet back on the accelerator and help get these negotiations back on track.

If negotiators are going to lay the groundwork for a fair, ambitious and legally binding deal (these are all of the things that the experts say we need for the deal to work) then they need direction from the world leaders. Stand up and make your voice heard, demand a pact to act on climate change.

Watch this space - I’ll be in Barcelona all week, following the negotiations and letting you know if world leaders are making the call for this week’s negotiations to succeed.

Read more about the action (Spanish)

UPDATE: After spending more than 10 hours at the Sagrada Familia, the 600 metre banner has been deployed! Thank you to all of the activists that made the demand “World leaders: make the climate call.” We will have pictures up soon.