There are just under 2 Million CSCS Green Card holders, the card provides evidence of health and safety training relevant to the industry. 
The UK Construction Industry employs around three million workers, and it is one of the most important & most dangerous employment sectors.  

Having skilled and competent workers is essential.Employers in the construction industry must ensure their workers are competent. Therefore, they need proof to support your claims of efficiency in health & safety.  The CSCS Green Labourers Card is the easiest way to demonstrate your skills.