My pet hate at the moment is scrapping the pizza delivery flyers out of our mailbox. Hackney (a London borough) households receive approximately 35 million pieces of unwanted mail each year, which weighs 900 tonnes and takes 6,000 trees to create. They produce a pack (pictured) which can help cutting it down including stickers and advice. Signing onto the Mail Preference Service (MPS) also is a good start. The pack is free (Hackney residents call 020 8356 6688) and most councils across the UK have an equivalent.