Only one-third of companies have succeeded in regaining the Standard - the world's first carbon reduction award for organisations taking action on climate change.
Lafarge Aggregates & Concrete UK, based in Syston, obtained recertification thanks to its energy- saving initiatives which have slashed carbon emissions by 16% over the last five years.
The Carbon Trust Standard is the world's first carbon award which requires organisations to measure, manage and reduce its carbon emissions and make real reductions year-on-year.
First certified in 2010, Lafarge was able to show further positive steps on cutting carbon in the two years since. Energy-saving measures have included using ducting to redirect heat generated from compressors to warm up workshops; installing timers on office heaters; installing individual switches on lighting; implementing 'soft starts' on crushers and conveyors; establishing more vigorous maintenance and repair programmes to optimise efficiency of equipment and, at Dowlow, replacing the bi-monthly grass-cutting routine with sheep grazing.