Asklemmy

Depends on where you live and your situation. You either limit your personal CO2 or the society's CO2 or even both. Most of my suggestions will make or save you money over time.

For personal you could do these, most of these will pay themselves back within 10 years in savings.

• Swap gas stove for induction stove
• Swap a gas boiler to heat pump + electric boiler
• Buy solar panels for the roof and/or battery
• Heat pump for domestic heating for colder regions.
• Home insulation such as triple glass windows
• For hot regions getting an awning for the windows facing the sun goes a long way.
• Selling car to buy EV (CO2 neutral at 1 year, less CO2 after that)
• Buying an E-bike if you have short trips and would like to bike more (CO2 negative almost instantly if you prevent car trips)

Otherwise if you don't feel like any of those investing in solar companies or battery production companies will make it easier for them to finance expansions to their operations and maybe even make you some money along the way.

If you live in the UK or applicable countries getting in on Octopus energy co-op energy production is a good way to invest the money and reduce CO2 at the same time.

Don't forget that an easy way to limit your carbon footprint is free. Notably plastics, aluminum, steel, other metals, concrete and beef.

To limit society's footprint you can show up to city Council meetings and advocate for bike paths and public transport which really goes a long way. Showing up with a couple of buddies, making them talk and buying beer for them after in one of the most cost effective ways to stop climate change. Often city council members just need some people to back them up when proposing the CO2 negative urban planning improvements.

Stopping climate change is all about taking small steps towards the solution, asking this question on lemmy is a great start.