One of the most environmentally friendly things you can do is to reuse/recycle products.
You can do this in by selling unwanted goods on sites such as Ebay, Music Magpie, SHpock, Gumtree, Facebook Marketplace, etc. This stops products going into landfill and you might even earn some money. Alternatively if this seems too time consuming then charity shops are always looking for donations.
You can also look to buy second hand items through these channels, this dramatically reduces the carbon footprint compared to new products. In addition to the sites above some charity shops have online shops or ebay stores. Not only is this environmentally friendly, but you can also put some much needed cash into these charities coffers. Oxfam has it’s own online store for second hand goods. Most other charity shops operate their own ebay stores.