A good and healthier way to reduce your carbon footprint is to grow your own organic foods in a garden / orchard. The food you grow yourself will taste better and will not require the fuel to transport it or the fuels used to make the pesticides. Being organic it will not have the poisonous pesticides on and in them and will be higher in nutrition due to the fact of the soil wasn’t depleted of nutrients from over farming. A simple garden requires a bit of work but is quite worth it and
if you can your own vegetables and fruits you can keep from having to buy much produce.
When you are forced to buy produce due to the inability to grow a vegetable or fruit due to climate or other factors then try to buy them as organic and when in season. Buying them in season and from as local as a source as you can will reduce the fuels required to transport them. The organic choice is not only healthier but due to the fact no pesticides are used reduces the fuels used in creating and transporting the pesticides.
Here are a few good articles on Gardening
Here are a few good articles on Home Canning/freezing etc.
Example Video from YouTube