There has been no business case to justify such investment, with the cost of emission allowances having been far below that of constructing a CCS facility.  It is also not reasonable to expect business to take on responsibility not only for capturing its own CO2 emissions but also to construct pipelines and permanent storage facilities without having significant public sector support to address practical problems. The phasing out of free allowances within the EU emissions trading system, and the rise in their price, changes the economic arguments but still does not address the need for help in creating a transport and storage infrastructure.