Another environmental organization has endorsed Sen. Tony Avella’s re-election.

The Queens Democrat on Tuesday received the endorsement of the Sierra Club — a nod that comes after the lawmaker got the backing of the New York League of Conservation Voters, who are making his campaign a top priority this cycle.

“The Sierra Club is proud to endorse Tony Avella and help return his leadership to the Senate”, said Roger Downs, Conservation Director for the Sierra Club Atlantic Chapter. “Avella has stood apart as the Senate’s leading voice in protecting New York’s environment and has played a key role in building the movement that has held fracking at bay in the Empire State. Anyone who appreciates clean air and water owes Senator Tony Avella a debt of gratitude.”

Avella, a member of the Independent Democratic Conference, faces former city Comptroller John Liu in a Democratic primary.

“The Sierra Club has been a leader among environmental organizations, from keeping New York’s drinking water clean to leading the fight against hydrofracking, they have been a crucial partner in protecting New York’s environment. For all these reasons and more, it is my honor to accept their endorsement. I look forward to continuing to stand side-by-side with them in the battle to defend New York State’s vital water resources,” Avella said in a statement.

Sierra Club this week endorsed Zephyr Teachout’s campaign against Gov. Andrew Cuomo in the Sept. 9 primary.