Especially if you don't have a garden indoor farming is a great way to grow herb, vegetables and fruits yourself. These techniques dont require soil, so its very clean. You can go for Hydroponics (nutrient rich water solution), Aquaponics (Fish-tank combination for full cycle) or Aeroponics (nutrient rich fog solution) systems.
Compost indoors, with Bokashi.
You don't need a garden or yard to compost. Bokashi composting is a process of fermentation that converts all food waste into compost in 4 to 6 weeks. Perfect for meat, fruits and veggies. It will be a great for soil and plants outside afterwards and you really made a personal impact.
Don't toss your food on trails.
Many people toss their fruits food scraps during driving or hiking into the nature. They will biodegrade but it will take a long time. For a Banana it can depending on the climate take up to 2 years.
Reflect on delivery.
Often times it's more sustainable to go into the store or restaurant or pick up the item or food yourself. You will avoid unnecessary packaging and potentially transportation emission from delivery. This depends obviously on distance and type of transportation you would use, since otherwise delivery can be actually more efficient, especially when the providers is running on electric mobility and multiple deliveries are carried.
Avoid food waste.
5–10% emissions can be reduced in average just by throwing less away. We should try not to waste food and through less away.
Choose cloth napkins.
Instead of buying paper towels or Kleenex use cloth napkins and handkerchiefs since they are reusable and have a multipurpose: tissue, hand towel, napkin or snack saver.
One effective way is to eat less animal related food like meat, milk, cheese or eggs - especially red meat (cows/labs). Meat lovers have a yearly footprint nearly double compared to vegetarians. 🍆
Organic farming for crops and vegetables has a lower environmental impact compared to conventional methods. Since fertile soils that are full of nutrients, organic food is usually also better for your health.
Eating food which is in season causes less emissions as the food has has not to be produced in heated greenhouses or has to be transported from far way - as distance matters a lot. Especiall avoiding hothouses and air freight can reduce dient impact by 10%.
Bring your own food.
Instead of buying packaged food everyday at work - consider to bring your own fresh food with recycled containers. Often times the quality will also be better and healthier. Avoid the additional plastic.
Transportable food container.
When you take away food from a restaurant, take away leftovers or take your own food to work consider to use a durable and reusable food container. By that you can decrease your waste a lot! Also great if you want to buy at a "package-free grocery store".