I am happy you agree it is the way to go! http://www.hulu.com/watch/67878/the-future-of-food Here is a video, does NOT cover all the reasons, not even close, but you will find it very informative.
First off, organic foods have higher nutrient content that conventional. They are better for you because the animals are not given antibiotics http://healthychild.org/blog/comments/the_truth_about_antibiotics_your_food/ (this link does not mention that the antibiotics are transferred through the meat or milk or egg and it goes into your body too!!), growth hormones, not fed food with pesticides, herbicides, synthetic fertilizers, or fungicides(which also pollutes the earth so you are helping cut down on that too!), live in more humane environments, and are not fed genetically modified crops which are HORRIBLE, please watch video for more info, and here are some links for you too http://healthychild.org/blog/comments/are_your_kids_allergic_to_food_or_whats_in_it/
http://www.foodconsumer.org/newsite/Safety/gmo/dangerous_toxins_from_genetically_modified_plants_0527110452.htmlThe movie Food, Inc also has more info on the food system, you can rent it, watch it on Netflix, or buy it on ebay for cheap. With crops such as fruits and veggies and grain- these are not treated with pesticides, herbicides, synthetic fertilizers, or fungicides so they do not get into your body from you eating it (even if you wash them, they are still inside the product itself because that product was grown in soil saturated with that crap).
Here is a list of produce to buy organic, and those that you dont need to worry about as much, although especially for nutrient content reasons, I always buy organic http://www.ewg.org/foodnews/summary/
Also, this list only addresses pesticides, you can bet that the soil is still saturated with at least synthetic fertilizers and herbicides...
Anyway, another reason is that organic food has no harmful preservatives or food colorings, here is more info on colorings http://healthychild.org/blog/comments/when_food_dyes_color_our_childs_behavior/
And, organic flour and sugar have not been bleached, grass fed animals produce leaner products with more good fats and better flavor (meat, eggs, etc. Just because its organic does not mean grass fed, you have to check packaging, if it does not specify, ask). Often, the "vitamins" you see on an ingredient label for, say, flour, are synthetic chemical isolates that do your body no good. In conventional food, these are often from GMO sources. Also, organic food oftentimes is made by a company who is more concious about making sure the packaging is healthy and environmentally friendly (such as Stonyfield organic yogurt)
Ok, so how to make this more affordable? I ask my local grocery store to order me in cases of organic butter, and then I talk them down on the case price (talk to a manager), and I freeze the butter. I get it for $4/lb, the shelf price is $4.89, maybe you can do better where you live, I live in a small town. I also order cases of other things like cheese that I can freeze. Also, there is a local family who has raw goats milk that I buy for 3.50/gallon which is much cheaper than store bought organic milk and MUCH healthier!! I get WIC benefits who allows organic milk so I would get it free anyway (not enough of it tho), but I would never feed pasturized homogenized milk to my kids so I buy raw.
I buy grass fed beef from a local family who raises it, it is cheapest when you buy a whole cow, but they sell it pretty cheap by the lb too.
Here is one of my favorite sites to buy organic from http://www.vitacost.com/
I buy things like organic pickles (the ones at the store have food colorings!), organic nuts, mac and cheese, dried fruit, pasta, Redmonds Real salt, granola bars, vitamins, probiotics, etc. Sign up for their emails and they have sales quite often. I also order some stuff including pancake mix from Alice.com they will put a $10 credit on your account for practically no reason if you email them with a complaint so I do that often lol.
All I can say I guess is just check prices online, compare to the store if it is available. You can always talk to a store manager and ask for a discount on whatever it is you want to buy, even produce. Buying in bulk is helpful, usually you can get a 15% discount or more off the shelf price by asking, they will only offer you 10% but work on them! Health food stores will do it too.
Go to local farmers markets, ask if they spray or dust their plants with anything. This is also a good place to look for raw milk because if you find someone who is in to natural living such as someone who does not treat their crops with anything because they believe it is unhealthy or someone who sells grass fed animal products, they might know of someone who sells raw milk, just ask. People who sell raw milk sometimes make their own butter, cheese, yogurt, etc too so you might be able to get that which is healthier and often cheaper.
There is this site, if you live on their delivery route. I have heard of other similar sites that deliver to diff areas but I dont know what they are, maybe ask in the finding your tribe section on mdc http://www.azurestandard.com/
Their stuff is pretty reasonable.
Also you can write to companies of organic products and ask for coupons, samples, etc.