Carbon footprint of your food

"'Eating local'...[although this] might make sense intuitively – after all, transport does lead to emissions – it is one of the most misguided pieces of advice... emissions from transportation make up a very small amount of the emissions from food and what you eat is far more important than where your food traveled from. "Transport is a small contributor to emissions. For most food products, it accounts for less than 10%" 

https://ourworldindata.org/food-choice-vs-eating-local

A summary of some of the main global impacts: 

Food accounts for over a quarter (26%) of global greenhouse gas emissions.

Half of the world’s habitable (ice-free and desert-free) land is used for agriculture.

70% of global freshwater withdrawals are used for agriculture.

78% of global ocean and freshwater eutrophication (the pollution of waterways with nutrient-rich pollutants) is caused by agriculture.

94% of mammal biomass (excluding humans) is livestock. This means livestock outweigh wild mammals by a factor of 15-to-1.

Of the 28,000 species evaluated to be threatened with extinction on the IUCN Red List, agriculture and aquaculture is listed as a threat for 24,000 of them.

https://ourworldindata.org/grapher/land-use-per-kg-poore

https://ourworldindata.org/environmental-impacts-of-food