Table 2 Articles dealing with specific aspects used to enrich the review results

Statistics and databases

[2, 35, 37, 73, 77]

Renewable gas production technology

[3, 4, 45, 46, 55, 56, 58, 59]

Technical potentials

[6, 7, 49]

Economic considerations

[9, 60, 67]

Legal/regulatory background

[20, 22, 26, 27, 33, 41, 48, 50, 78]

Methane leakage

[74,75,76]

Energy storage technologies and potentials

[36, 38, 39]

Hydrogen as an energy vector

[40, 51, 53, 57]

Implications and developments on end-user side

[64,65,66, 69, 70]

Electricity grid issues

[42, 43]

Policy considerations

[61, 71, 79, 109]