Sen. Bernie Sanders spent $1.65 million on private jet travel in February.

The Vermont senator spent a ton on private air travel last month, compared to his competitors. Hillary Clinton spent $1.5 million, Gov. John Kasich spent $951,000 and Sen. [crscore]Ted Cruz[/crscore] spent $119,000.(RELATED: Trump Continues To Give Millions To His Campaign)

Sanders certainly earned the lavish perk, as he raised more than any campaign in February — $43.5 million, The Morning Consult reports, according to FEC records.

Throughout his campaign, Sanders has made global warming a key theme. He believes it is a great national security threat than ISIS.

According to Greenpeace, “In terms of damage to the climate, flying is 10 times worse than taking the train.”