A liquefied natural gas production system using liquid nitrogen as a primary refrigerant, the system comprising: a natural gas stream from a supply of natural gas; a liquefied nitrogen stream from a supply of liquefied nitrogen; at least one heat exchanger that exchanges heat between the liquefied nitrogen stream and the natural gas stream to at least partially vaporize the liquefied nitrogen stream and at least partially condense the natural gas stream; characterized in that the liquefied natural gas production system comprises a greenhouse gas removal unit comprising a distillation column having a heat pump condenser and reboiler system, the greenhouse gas removal unit configured to remove greenhouse gas from the at least partially vaporized nitrogen stream, wherein the heat pump condenser and reboiler system comprises a compressor that increases a pressure and condensing temperature of an overhead stream of the distillation column, a heat pump heat exchanger to cross-exchange the overhead stream of the distillation column and a bottoms stream of the distillation column to affect both an overhead condenser duty and a bottom reboiler duty of the distillation column, a pressure reduction device, connected to an output of the heat pump heat exchanger, and configured to reduce a pressure of the distillation column overhead stream after the distillation column overhead stream has passed through the heat pump heat exchanger, and a separator, connected to an output of the pressure reduction device, and configured to produce a first separator overhead stream, wherein the first separator overhead stream is gaseous nitrogen that exits the greenhouse gas removal unit having greenhouse gases removed therefrom; at least one expander service that reduces the pressure of the at least partially vaporized nitrogen stream; and a controller that adjusts an inlet temperature of a first of the at least one expander service to affect an overhead condenser duty and a bottom reboiler duty of the distillation column. a natural gas stream from a supply of natural gas; a liquefied nitrogen stream from a supply of liquefied nitrogen; at least one heat exchanger that exchanges heat between the liquefied nitrogen stream and the natural gas stream to at least partially vaporize the liquefied nitrogen stream and at least partially condense the natural gas stream; characterized in that the liquefied natural gas production system comprises a greenhouse gas removal unit comprising a distillation column having a heat pump condenser and reboiler system, the greenhouse gas removal unit configured to remove greenhouse gas from the at least partially vaporized nitrogen stream, wherein the heat pump condenser and reboiler system comprises a compressor that increases a pressure and condensing temperature of an overhead stream of the distillation column, a heat pump heat exchanger to cross-exchange the overhead stream of the distillation column and a bottoms stream of the distillation column to affect both an overhead condenser duty and a bottom reboiler duty of the distillation column, a pressure reduction device, connected to an output of the heat pump heat exchanger, and configured to reduce a pressure of the distillation column overhead stream after the distillation column overhead stream has passed through the heat pump heat exchanger, and a separator, connected to an output of the pressure reduction device, and configured to produce a first separator overhead stream, wherein the first separator overhead stream is gaseous nitrogen that exits the greenhouse gas removal unit having greenhouse gases removed therefrom; a compressor that increases a pressure and condensing temperature of an overhead stream of the distillation column, a heat pump heat exchanger to cross-exchange the overhead stream of the distillation column and a bottoms stream of the distillation column to affect both an overhead condenser duty and a bottom reboiler duty of the distillation column, a pressure reduction device, connected to an output of the heat pump heat exchanger, and configured to reduce a pressure of the distillation column overhead stream after the distillation column overhead stream has passed through the heat pump heat exchanger, and a separator, connected to an output of the pressure reduction device, and configured to produce a first separator overhead stream, wherein the first separator overhead stream is gaseous nitrogen that exits the greenhouse gas removal unit having greenhouse gases removed therefrom; at least one expander service that reduces the pressure of the at least partially vaporized nitrogen stream; and a controller that adjusts an inlet temperature of a first of the at least one expander service to affect an overhead condenser duty and a bottom reboiler duty of the distillation column.