Crackofdoom is right, though I will say that personal actions are necessary but wholly insufficient. We need to tackle the problems at both ends - personal actions and collectively. Watch the video “Forget Shorter Showers” (around 10 mins). Would other big events in history have been solved by personal actions, stopping Hitler or ending racial segregation in the US in the civil rights era. Of course, personal choices can play their part, eg there was a big sugar boycott in the slavery era, but ultimately it’s system change we need and that requires collective action.
Looking at personal actions, it’s important to think of them as a hierarchy and choose the big fruit, rather than the tiny low hanging berries like bamboo toothbrushes when you fly longhaul every year for example.
Don’t fly (or limit to one or two more flights in your lifetime).
Cut back on driving, walk, cycle, or catch the bus where possible.
Buy second hand clothes and look after the ones you have. Mend holes (darning tutorials on you tube). Prevent clothes moths, reduce tumble drying (all that lint is your clothes wearing out faster). Take shoes to the cobbler to be resoled. Don’t buy fast fashion, this is a big contributor to climate change.
Eat locally produced organic unprocessed food where possible. Buy the best meat you can afford. Pastured meat sequesters carbon in the soil, so is a different beast from intensively reared meat, which requires soy/grain feedmeal and is hugely polluting. Get a meat & veggie box if there’s no local market and independent butchers/greengrocer near you. Go for cheaper cuts of meat to help the budget (and they happen to be delicious slow cooked).
Take your own tupperware to the butchers and mesh bags to the greengrocers. At the supermarket likewise take your containers to the counters. Look out for refill shops near you where you can buy loose dry goods and refill liquids like shampoo, conditioner and washing up liquid.
Insulate your house well, it is a much bigger savings vehicle than current interest rates on savings accounts. Put a jumper on before putting on the central heating.
Be mindful about using the internet, it is one of the fastest growing electricity demands globally. All that data is held on servers and data centres that have to be cooled and requires large amounts of energy to transmit to you. Watch videos at a lower resolution (click on the cog), delete unwanted emails, unsubscribe from mailing lists, don’t buy bitcoin (requires a phenomenal amount of processing power) etc. Delete unwanted photos/videos etc you store in the cloud (inc social media).
www.theguardian.com/environment/2017/dec/11/tsunami-of-data-could-consume-fifth-global-electricity-by-2025