I used to cycle to work, but in all honesty, I was a danger on the roads. I am not good at riding a bicycle. I waver and fall at random and I stopped cycling because it wasn't safe for me or other people on the road. No way in hell would I do this with 2 children in tow.
Public transport is very expensive and basically non-existent where I live. Lugging around 2 children under 3 when the nearest bus stop is a 20 minute walk across a busy road to then ride to a shop that is another 5 minute walk from a bus stop to do groceries is far too difficult. Plus, buses only come twice per day.
Pretty much all supermarkets use plastic packaging. I buy loose produce where possible, but it's not feasible to avoid all plastic packaging. The local butcher and greengrocer are far too expensive for me.
My garden is small and won't even let grass seed take, so attempting to grow my own produce would be futile. I also don't enjoy gardening, but that's besides the point.
I wish I could buy better quality clothing and household items, but there is a definite cost barrier. I try not to buy poor quality, but when you can get a pair of children's shoes for £6 that would last 3 months instead of forking out £40 to last until they're outgrown in 6 months, I can't justify the hit on our finances at the moment.
We had our heating on more than usual this winter because we had a newborn. We're in a rental, so installing solar panels as if we could afford to isn't an option.
My family live in Canada, so we fly across the Atlantic every few years and my parents fly to visit us a few times per year. There isn't really a viable alternative to travel that far, so plane it is. I would also fly to a holiday destination if we had the money, but only once per year at most. British holidays are always rainy and expensive in my experience.
We eat meat 3-4 times per week, which I'd like to change, but in all honesty, I haven't found many vegetarian recipes that I like. I would not consider veganism, as I disagree with many of the principles involved, and if I'm drinking milk, eating cheese and wearing leather, I may as well utilize the full animal and eat the meat. Buying from an eco-friendly local butcher would be ideal, but as I said before is cost prohibitive.
I am conscious of the environment. I use secondhand clothing and items, maximalize use of everything we own, walk where possible, buy locally where possible, recycle, use eco-cycles on my washing machine and dishwasher, don't use disposable sanitary products, and conserve water with short showers twice per week and bathing the children together twice per week. Until big businesses and governments face up to the massive impact of their actions, I don't think changing anything else that my family does is worth the sacrifice in the grand scheme of things.