Sen. Edward MarkeyEdward (Ed) John MarkeyOvernight Regulation: FTC launches probe into Equifax | Dems propose tougher data security rules | NYC aims to slash greenhouse gas emissions | EPA to reconsider Obama coal ash rule Overnight Cybersecurity: Kaspersky to testify before House | US sanctions Iranians over cyberattacks | Equifax reveals flaw that led to hack Dems propose data security bill after Equifax hack MORE (D-Mass.) used a chart showing that the number of home runs increased when players used steroid, saying it’s the same case with temperatures rising when humans emit greenhouse gases. 

“Something very funny happened in baseball because from 1920 all the way through the entire modern baseball history, the average number of players that hit more than 41 home runs in a season was three players,” Markey said Monday night. “All of the sudden 17 players could hit more than 41 home runs. … Then somebody thought, ‘maybe they’re injecting these players with steroids.’”

Sens. Brian Schatz (D-Hawaii) and Sheldon Whitehouse (D-R.I.) are leading an all-night Senate session to discuss the importance of climate change. More than 20 other Democrats have participated, including members of leadership. Senators are expected to speak well into Tuesday morning.

Markey said scientists have a similar chart to the one he used when talking about home runs. He said there was “an obvious correlation” between temperature increases on earth and human's "injecting" pollutants into the atmosphere.

“Left unchecked the impacts of climate change will only get worse in the future,” Markey said. “By the end of the century Massachusetts’ summers could feel like North Carolina’s.”

While serving in the House, Markey was a loud critic of climate change deniers. He led efforts to tax carbon emissions through a cap and trade system.

On Monday night, Markey advocated for more federal investment into renewable energies such as tax credits for solar and wind.

Markey also quoted the Dr. Seuss classic, "The Lorax."

"'Unless someone like you cares a whole awful lot, nothing is going to get better, it’s not,'" Markey read before thanking the others who "care a whole awful lot."