Eat organic or eat local? Either way, we are helping the environment. If you can find local, organic food, you have the best of both worlds.
Why make your own food from scratch? It just makes sense economically and healthwise to make what you eat from scratch. Reducing the amount of processed foods you buy can save you money. You can also save money by purchasing ingredients in bulk IF you can store the ingredients properly and use them relatively quickly. Making your own food versus using a packaged product also decreases the amount chemicals you put in your body.
Here are some ways I save money and still eat organic food. First I have my own garden and I can, freeze, and dry any extra produce. If you don't have a garden, you can still preserve fresh food that is in season and on sale in the store. Go here for instructions for canning and drying food. I also buy some foods in bulk from a health food co-op. You can find health food co-ops here. I bought 25 lbs of oatmeal, stored it and used it to make my own granola. See my granola recipes here.
What I don't grow, I can sometimes find at a farmer's market. If you want to buy a lot, you might be able to get a bulk discount. Just ask the farmer. Usually he/she doesn't want to end up with wasted produce. You can also take a subscription to a CSA which is a cooperative garden where a farmer grows the food and supplies you with a certain amount each week. This way you get fresh organic vegetables all growing season plus most CSA's offer other things like honey, eggs, and even bread.
Sometimes you can't find all organic ingredients for a recipe. Making it from scratch is still often better than buying a processed version because you won't be adding preservatives or other things you don't need.