Then there's this video, that talks further about how food and packaging waste have an "insidious, long-term impact on our environment, our wildlife and ultimately our own health".
Besides being a cheaper option, another reason why D and I started Purely Bulk Foods to buy food in bulk is because it reduces the amount of plastic packaging that is used. It's a slower and more thoughtful process because you don't have the convenience of simply grabbing the item you want and go. You actually have to think about bringing something with you to contain the items you purchase. But I think, and hope, that it's merely a shift in habits.
And a win-win way to do this is to reuse jars and containers that previously came as as packaging for some other food you've purchased. I have a collection of clean pasta and jam jars at home, ready to be used as vases, piggy banks and food storage. They do look rather pretty once you've removed the labels by soaking them in hot water (you can use eucalyptus oil for the really stubborn ones).
I got a bunch of Moccona (coffee bean) jars off Freecycle a while ago and they have come in very handy for storing some of the whole foods we've got. Add a bit of washi tape to help with labelling—in case you can't remember everything you've got and confuse plain flour with self-raising flour—and away you go!
And yes, I know we need to get more cashews.