If you have a garden and can afford a small corner of space, then making your own compost is one of the most environmentally sound practices you can do.
It gives you a handy way of disposing of garden and kitchen waste, provides you with nutrient-rich compost that will feed your plants and improve the soil, and also helps keep armies of worms and bugs happy as they get on with the work.
At its simplest, all you need to do is create a pile of suitable material and, with minimal effort, it’ll, eventually turn into compost if you give it a year or two.