Which foods should you buy organic?
I'm a huge advocate of organic food for many reasons such as...
Reducing our intake of:
Pesticides
Fertilisers (including sewerage used as fertiliser)
Growth hormones
Antibiotics
Genetically modified foods
Increasing the foods and therefore our intake of:
Nutrients such as antioxidants
Omega 3 fatty acids
Benefitting the environment by:
Improving soil and water quality
Reducing pollution
Safer and better farming practices for animals
promoting a self-sustainable cycle of farming

I buy as much organic as I can, but organic foods are more expensive (for good reason), so if you can't afford to buy all organic, which are the most important foods to buy organic and which are the least important
Well, there is a list, which gets reviewed every year called the clean fifteen and dirty dozen. This lists the 15 foods its best to not eat organic if you can't afford to and the best 12 to buy organic if you can. This is because these foods take up more of the chemicals. (Heading to the EWG website you can see the full list which gives you more than the 12 and 15.)
So what are the dirty dozen and the clean fifteen.
The Dirty Dozen
Strawberries
Spinach
Kale, collard or mustard greens
Nectarines
Apples
Grapes
Bell and hot peppers
Cherries
Peaches
Pears
Celery
Tomatoes
These should if possible always be bought organic.
The Clean Fifteen
Avocado
Sweetcorn
Pineapple
Onion
Papaya
Frozen peas
Asparagus
Honeydew melon
Kiwi
Cabbage
Mushrooms
Cantaloupe melon
Mango
Watermelon
Sweet potato
If you can't buy all organic these are the safest foods to buy non organic.