Young people are being sought to quiz governments and business people about climate change.
For the first time, the Environment Agency annual conference will bring school-age pupils into the fold.
"Ambassadors" from the UK Youth Climate Change Coalition and British Council Climate Change Champions will take part in a debate with influential government figures.
Other young people aged 10 to 18 can put their questions to the panel online. The ambassadors will report live from the conference via Twitter, Facebook, YouTube and their own websites.