The European Commission has proposed slowing the pace of emissions reductions under the EU Emissions Trading System (ETS) from 2031, with the linear reduction factor set at 3.7% for 2031-2035 and further reduced to 1.7% for 2036-2040. This would allow new allowances to enter the system into the 2040s, rather than the previously planned 2039 cutoff. WWF warned the change would permit an additional 2 billion tonnes of CO2-equivalent emissions.