Plastic is everywhere, in the liners of tin cans, baby bottles, the water pipes in our homes. Chemicals leaching out of plastic are in the very air we breath.
Last week on the Current Podcast they had two episodes about plastic. As usual I’m behind on my podcast listening so I just heard them a couple days ago.
Plasticizers which give plastics flexibility and durability contain chemicals like phthalates and adiphates and are notorious for leaching out. An example given on the show is the new car smell.
Plasticizers mimic hormones and thus become endocrine disrupters. In nature these hormone mimics are causing havoc. A study done on endocrine disrupter hormones such as estrogen has found that some male animals are becoming increasingly feminized. For example male minnows found in the St. Lawrence Seaway are being born with female reproductive organs in their testes, and are thus unable to reproduce. These minnows are at the bottom of the food chain. Their disappearance could ultimately lead to its collapse. When these minnows were fed to laboratory rats the male rat babies were found to have lower sperm counts and their sperm were not as viable, they couldn’t swim straight. Scientists on the show caution that none of these studies have been done on humans. But, as Anna Marie Tremonti, host of the Current Podcast says, people are eating the bigger fish found in the St. Lawrence Seaway so wouldn’t that have the same effect on humans as it did on the laboratory rats?
We ingest plasticizers everyday from the plastic our food is wrapped in. Think of the cheese you buy from the grocery store or the sandwich you took to work in your packed lunch. Apparently these plasticizers can be broken down in the environment. Sounds good except the scientists found that the things the plasticizers broke down into are even more dangerous, than the plastic itself.
Pretty scary stuff and what are we going to do about it?
The second podcast discusses how to eliminate plastic from your life. I thought soft plastic, like foodwrap, was worse than hard plastic, like drinking bottles or the containers I use to store leftovers in my fridge, apparently not.
At the bottom of plastic containers there is a recycling symbol with a number from 1-7 in the middle of it. These numbers are helpful for recycling but they are also an indication of plastic content. Plastics with numbers 1 2 4 and 5 are better than plastics with numbers 3 6 and 7.
I went through my kitchen to get rid off all the offending plastic with the numbers 3 6 and 7. There wasn’t much to throw away. I was encouraged to see that most of the plastic food containers had good numbers on them.
Yesterday, I was talking to a friend who told me that Mountain Equipment, MEC, had pulled all the coloured drinking bottles off their shelves because they contain Bisphenol A which has been linked to cancer. I had already chucked my water bottle because it is a number seven plastic.
I use my water bottle almost every day and depend on it when I'm in the backcountry so I'm anxious to replace it with a Bilt Designs Fresco Water Bottle made out of stainless steel, when MEC replenishes their stock.
To listen to these podcasts go to the Current Podcast page scroll down and click on, 05/12/2007: Plastics, this is the show with the background about plasticizers. You can also click here to listen to the show.
The second show with advice about good and bad plastics is called, 06/12/2007: Letters, and plastics, revisited, The segment about plastic is halfway through the show. You can click here to listen to it.