- I changed my employer in December to work on renewable energy topics. It gained me 5000€/a, so win/win.
- I switched my power supplier to eco 5 years ago. Probably 50€ per year. It is important to choose a real eco-friendly tariff. Some are only labeled as environmentally friendly.
- I am donating to greenpeace and other environmental ngos (as well as planting trees). ~400€ per year.
- I stopped using a car a few years ago. I am substituting it by public transport and/or my bike. Occasionally, I still rent a car, however much less. I would say, it costs a lot of time sometimes but it is hard to figure out the number. All things considered, I am certainly saving money.
- I am only buying organic food and especially meat with no compromise. It probably costs me 50-100€ per month compared to shopping in a discounter market. Since the meat is quite expensive, I reduced consumption drastically (but not only for economic reasons).
- I am not taking airplanes anymore to go on holiday. This costs a lot of time. My last travel to Greece took 3 days instead of 3 hours.
- I have reduced shopping and online shopping to a minimum. It just saves money and time as well.
- I have put stickers for the past global climate strike, it cost me a few hours. Participating some hours as well.
- I am always bringing my tupperware for picking-up food (except pizza), no compromise, no one-way packaging. This is not really combatting climate change but it helps against environmental pollution.
- Countless hours of debating with people :-D
Also, many little things which I forgot to/can't mention. I think everybody should do as much as he or she can, get used to it, do more, get used to it, do more, etc. :)