Advertisements encourage the use of products and sponsorship promotes a positive reputation & creates a social licence of trust & acceptability. In 2003 a ban on all tobacco advertising was introduced and has arguably worked. I believe continued fossil fuel usage will kill more people than smoking.
You may be interested in these active petitions
Fossil fuel advertising has a history of ‘greenwashing’ and a recent report identifies £4bn+ spent by FF companies on 205 active sports sponsorship deals. There is plenty of evidence that FF must be rapidly phased out to mitigate the worst impacts of climate breakdown. I think that preventing the companies’ efforts to enhance their social capital and normalise their activities would proactively help address the climate crisis and mitigate future harm to human health.