What is the net-zero target of Walmart, and do they report scope 3 emission?

If an entity relies on fossil fuels, does that mean it's not pledging net zero credibly?

If a city or subnational government doesn't have control of out of boundary emissions (e.g., electric utilities), how can it credibly set a net-zero target?

What are Scope 3 emissions and what categories of Scope 3 emissions should a company/subnational government include in a net-zero target?

If a company uses the CO2 equivalent (Co2e) as a unit of reporting within their sustainability report, but hasn't explicitly stated which gases are covered by the target, can it be assumed that their reporting and the target covers more than just carbon dioxide?

I want to create an agenda for my high school class to talk about net zero and climate change. Help me create an agenda for my class and an intro paragraph.