Hence breast when possible is far better for the environment and may be better for the baby too.
Blocked sinks - advice
Finally, thank you for some further advice following the article on environmentally friendly household cleaning. If you are having trouble obtaining cheap sodium bicarbonate to clear blocked sinks I know that many chemists sell it in 500g boxes and that many supermarkets sell boxes of sodium carbonate (washing soda) that will work just as well. It was also suggested to me that caustic soda (sodium hydroxide) available from the chemist, would work even better, even turning the fat in blocking the sink into soap. This may be true but it is dangerous, spitting hot corrosive liquid out of the sink, so if you do decide to use caustic soda please be careful!
Please keep your ideas or comments coming in.