Schoolchildren were encouraged to think about what they threw away during a waste awareness week.
The project, which ran in schools across the county, asked children to try to reduce their amount of rubbish as part of the EDF national Waste Week.
A total of 84 schools in Hertfordshire took part in the scheme, which focussed on the amount of food and food packaging being thrown away as well as ways in which to recycle. It encouraged composting more rubbish to reduce the amount of waste going into landfill sites.
Robyn Thorn, EDF’s education programme manager, said: “Waste week is a great initiative that raises awareness of lunchtime waste at schools.
“It’s not a one-off event, but a campaign that allows children and young adults to truly embrace green issues and make a real difference over time.
“We hope initiatives like Waste Week will continue to grow engagement with young people across the country.”
Schools taking part were given campaign packs including posters, stickers and badges, as well as online access to games, lesson plans and practical activities.
The campaign was launched by Paralympic gold medallists Liz Johnson and Tom Aggar.
Liz said: “For Waste Week, I’m going to ensure that all fruit and veg waste goes in the compost bin and check whether anything else I’m throwing away could be recycled.”
Tom said: “Working with EDF Energy has made me even more aware of how important it is that we do all we can to help the environment.”