Britain on Thursday became the world's first major economy to adopt the tough new target of lowering fossil fuel emissions to a level of net zero by 2050.
Energy and Clean Growth Minister Chris Skidmore signed the order paper enacting the legislation after it passed both houses of parliament without a vote earlier this week.
"The UK kick-started the Industrial Revolution, which was responsible for economic growth across the globe but also for increasing emissions," Skidmore said in a statement.
"Today we're leading the world yet again in becoming the first major economy to pass new laws to reduce emissions to net zero by 2050 while remaining committed to growing the economy."