The Service Employees International Union (SEIU) on Thursday endorsed the Green New Deal, putting it at odds with other unions that have been critical of the ambitious environmental agenda.

SEIU's International Executive Board passed a resolution in support of the sweeping environmental proposal at its board meeting in Minneapolis.

"We've been inspired by the fearlessness and courage of the climate change activists whose direct action and bold demands for change have put this issue front and center in the national conversation," said Mary Kay Henry, the international president of SEIU. "The Green New Deal makes unions central to accomplishing the ambitious goal of an environmentally responsible and economically just society."

SEIU called the Green New Deal vitally important for people of color, saying their communities are most impacted by the environmental issues the proposal is intended to address. The union added that its members support "immediate, bold action" on climate change.

SEIU said it is the first national union to endorse the Green New Deal.

Other union leaders have been skeptical of the environmental proposal introduced earlier this year by Rep. Alexandria Ocasio-Cortez (D-N.Y.) and and Sen. Ed Markey (D-Mass.).

Terry O'Sullivan, general president of the Laborers' International Union of North America called the Green New Deal "exactly how not to enact a progressive agenda to address our nation's dangerous income inequality" and "exactly how not to win support for critical measures to curb climate change."

Separately, seven unions told House Energy and Commerce Committee Chairman Frank Pallone Jr. (D-N.J.) that they had "grave concerns about unrealistic solutions such as those advocated" by the Green New Deal.