Supply chain improvements have helped Marks & Spencer reach 39 out of its 100 Plan A commitments.
At the halfway stage of its plans to become more environmentally friendly, Sir Stuart Rose, chairman of Marks & Spencer, said that they were making "strong progress".
Among progress made is the opening up of a green factory in China as well as one in Wales and two in Sri Lanka.
"Plan A isn't only important to us, it's also significant to our customers," Sir Stuart said.
"They've told us that despite the impact of the recession our commitment to the environment and trading fairly is still important to them."
Among some of the initiatives that have been successful is the reduction of plastic bag usage, which has been cut by 83 per cent since the charging of 5p per bag.
Other plans include the reduction of carbon emissions in all of its outlets and offices as well as helping suppliers cut their emissions through "practical advice".
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