Library of Ideas: Compost
Compost whatever you can rather than binning it (and sending it to landfill).
Compost converts organic waste into soil carbon; landfill creates the greenhouse gas methane. Tips on how to make compost.
Further information:
https://www.which.co.uk/reviews/compost/article/compost-bins/how-to-make-compost-al6lJ2N6qxmi#
https://plantingup.co.uk/composting-101/
Time commitment: Low