Many countries have emissions targets coming close to zero by 2050.

• The European Union as a bloc aims to reduce its emissions to 80-95% below 1990 levels by 2050.

• Denmark has comprehensive plans to be fossil fuel free by 2050. Sweden aims to do the same.

• Norway has agreed a goal of being carbon neutral by 2030 (although it will rely on buying carbon credits from other countries to achieve this in that timeframe).

• The UK has a legally binding target to reduce emissions by at least 80% below 1990 levels by 2050 under its Climate Change Act. Following the Paris Agreement, The UK Government is now discussing amending the Act with a zero carbon target.

Several cities and regions have also made zero carbon commitments.