A new ad campaign from an environmental group and a Democratic group praises the work of several Democrats, many of whom come from swing districts, on environmental issues.

The $1 million ad buy from the League of Conservation Voters (LCV) and House Majority Forward praises the efforts of eight lawmakers to fight climate change, ban offshore drilling or regulate a class of cancer-linked chemicals called PFAS.

“Poll after poll shows people are demanding action on climate change, clean water and clean air more than ever before,” said LCV President Gene Karpinski in a statement.

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“Fortunately these environmental champions in Congress are responding in big ways by passing legislation and holding polluters accountable,” Karpinski added. “We want their constituents to know about several recent actions where their representatives put the health and safety of people and the planet first so they can thank them and encourage them to keep making progress on these issues.”

The ads praise the work of Democratic Reps. Kathy Castor Katherine (Kathy) Anne CastorOVERNIGHT ENERGY: Democrats push resolution to battle climate change, sluggish economy and racial injustice | Senators reach compromise on greenhouse gas amendment stalling energy bill | Trump courts Florida voters with offshore drilling moratorium Trump courts Florida voters with moratorium on offshore drilling Lawmakers, public bid farewell to John Lewis MORE (Fla.), Joe Cunningham Joseph CunninghamTrump asked Chamber of Commerce to reconsider Democratic endorsements: report GOP leader says he doesn't want Chamber's endorsement: 'They have sold out' Karen Pence stumps for GOP SC congressional candidate MORE (S.C.), Antonio DelgadoAntonio Ramon DelgadoGOP leader says he doesn't want Chamber's endorsement: 'They have sold out' US Chamber of Commerce set to endorse 23 House freshman Democrats Democrats go big on diversity with new House recruits MORE (N.Y.), Andy Kim (N.J.), Elaine Luria Elaine Goodman LuriaVirginians wait up to four hours to cast early voting ballots US Chamber of Commerce set to endorse 23 House freshman Democrats House panel votes against curtailing Insurrection Act powers after heated debate MORE (Va.), Elissa Slotkin Elissa SlotkinWray: Racially motivated violent extremism makes up most of FBI's domestic terrorism cases Overnight Defense: House chair announces contempt proceeding against Pompeo | Top general says military has no role in election disputes | Appeal court rejects due process rights for Gitmo detainees Top general: Military will play no role in resolving any electoral dispute MORE (Mich.), Abigail Spanberger Abigail Davis SpanbergerTrump asked Chamber of Commerce to reconsider Democratic endorsements: report Virginians wait up to four hours to cast early voting ballots The Hill's Morning Report - Sponsored by The Air Line Pilots Association - Pence lauds Harris as 'experienced debater'; Trump, Biden diverge over debate prep MORE (Va.) and Xochitl Torres Small (N.M.).

The 30-second spots highlight environmental issues in each lawmaker’s state and urge viewers to “thank” the lawmakers for their work.

For example, the ad featuring Slotkin says “Michigan has the most PFAS-contaminated sites in America, and for too long, Washington did nothing about it. But congresswoman Elissa Slotkin did. She’s made cleaning up these dangerous chemicals a top priority.”

They will initially run on television for two weeks, according to the statement.

In response to the ads, National Republican Congressional Committee spokesman Bob Salera said in a statement that “all the dark money spending in the world isn’t going to save Democrats from the impending disaster of their party nominating a socialist as their presidential candidate.”