Garbage incinerators with CO2 capture and geological storage; that is a net CO2-negative process, and you can recover energy in the form of domestic heating, to

Garbage incinerators with CO2 capture and geological storage; that is a net CO2-negative process, and you can recover energy in the form of domestic heating, too. This is not a fantasy technology; everything needed to do this already exists and can be purchased. An extra bonus is that you also vastly reduce the pollution problems associated with landfills.