Tesco is to remove one billion pieces of plastic from products by the end of 2020 as it seeks to reduce its environmental impact, it has announced.
The supermarket will end its use of small plastic bags, commonly used to pack loose fruit, vegetables and bakery items, and replace them with paper ones.
It will also remove plastic trays from ready meals, secondary lids on products such as cream and yoghurt, sporks and straws from snack pots and drinks cartons, and 200 million wrappers used to pack clothing and greetings cards.
Where non-recyclable and excess packaging cannot be removed, for example where it prevents food waste, the retailer has pledged to reduce it to an absolute minimum.
It is also looking at new ways to reuse its packaging, stating that "if packaging can't be recycled, it will have no place at Tesco".
Tesco met 1,500 suppliers in August to let them know that packaging will form a key part of its decision-making process to determine which products it sells, and that it reserved the right to no longer stock items that use excessive or hard-to-recycle materials.
Tesco chief executive Dave Lewis said: "Our work to 'Remove, Reduce, Reuse & Recycle' is already transforming our packaging. Over the next 12 months, we will remove one billion pieces of plastic, further reducing the environmental impact of the products we sell.
"By focusing on solutions that we can apply across all our UK stores and supply chain, we can make a significant difference and achieve real scale in our efforts to tackle plastic."
WWF UK's sustainable materials specialist Paula Chin said: "Plastic pollution is the most visible symptom of the environmental crisis we're currently facing.
"Businesses, governments and households have all got an important part to play, so it's good to see Tesco's commitment to significantly reduce the amount of plastic we use."
The announcement is the latest by retailers undergoing large-scale targeting of packaging waste.
In September, Sainsbury's pledged to halve the amount of plastic used in its stores by 2025.
Louise Edge, head of Greenpeace UK's ocean plastics campaign, said: "Tesco is absolutely doing the right thing in looking to reduce the number of pieces of plastic packaging it produces.
"When supermarkets focus solely on reducing their packaging by weight, this can trigger a policy of light-weighting - meaning packaging gets thinner or smaller, but still exists as a throwaway item that can pollute our waterways and harm marine wildlife.
"Last year Tesco produced more than 18 billion pieces of plastic, so they've still got plenty of work to do, but this is a good start and we hope to see further reductions when it introduces its reusable packaging scheme for online orders in the New Year."