Sourcing food locally is good for the environment and supports local businesses. It's great to buy from local farmers markets, as the food will be fresh and seasonal. However, the emissions produced from transporting food is tiny compared to the gases emitted on the farm. Transport accounts for just 0.5% of the emissions from beef.
Focusing on what you eat has a much bigger impact than where it’s from.
However, it is important to consider how your food has been transported. Delicate foods that travel by air - like berries and green beans, aren't great as planes use a huge amount of fuel compared to shipping. This is where seasonality comes in - enjoy berries in the summer when they are grown locally, but not in the winter when they are flown across the world.