Data shown in the graphic are taken from the research paper: Quantifying the potential for climate change mitigation of consumption options, Diana Ivanova et al 2020 Environ. Res. Lett.  To read the article in full click here or you can see at summary from the Priestley International Centre for Climate at Leeds University.

In summary transport options have the highest potential for change, especially if people live car-free, shift to a battery electric vehicle and/or take fewer long-distance flights. Both car and air travel tend to increase sharply with rising income, so these mitigation changes are particularly important in a high-income context.

Adopting a vegan diet has the biggest impact from a food perspective. Other considerations such as how food has been prepared, stored, produced and sourced are important. Reducing animal-based products in our diet may come with various health improvements, which is an important additional benefit in the context of the coronavirus crisis.

Investing in generating renewable electricity saves the most emissions from a housing point-of-view, with refurbishment and renovation to improve the insulation and energy efficiency of the home also making the top ten list.