How much money would it take to buy a pint of organic milk vs. conventional milk once a week? Over here organic milk is just a few pence more.

When I see the junk (food and otherwise) that people of all incomes buy, I wonder. Setting aside those who genuinely can't afford it, there are clearly a lot of people who could afford to make a small change like this. And just think what a difference it would make if, say, 80% of the population made the switch.