With the Copenhagen climate change summit now over, many are saying an ambitious deal is impossible and that we should all give up. Well I disagree.
While the deal was far from everything we hoped for, public pressure was critical in securing the gains we did achieve - such as aid for poor countries.
The British Government was at the forefront in pushing for an ambitious deal and I know that public concern about climate change was key to that. It's now critical that we ensure that countries stick to their pledges and work on more ambitious efforts to tackle climate change.
Public pressure will therefore become more important - not less important. I've sent a direct message to Ed Miliband and I'd urge you to do the same at EdsPledge.com