But councillors aim to reduce emissions significantly in the next ten years. And initiatives to cut CO2 may include encouraging residents to eat less meat and dairy, tackling food waste and boosting walking and cycling. 'Gamification' could also be used to push residents towards greener lifestyles - with people rewarded for following low-emission behaviours, a council meeting heard. City of York Council declared a climate emergency in March 2019 and committed to becoming carbon neutral as a city by 2030. But detailed analysis of York's carbon emissions has now revealed it could cost up to £3 billion to roll out all the technically viable options to cut CO2 - and this would reduce 69 per cent of the city's predicted emissions by 2030.