US Interior Secretary Ken Salazar, who played a key role in developing America’s domestic energy resources, has resigned from the post.

He, however, will leave the Cabinet in March and will return to his home state of Colorado.

Accepting his resignation, President Barack Obama said Salazar has helped usher in a new era of conservation for the nation’s land, water and wildlife.

Salazar has played an integral role in the administration’s successful efforts to expand responsible development of the nation’s domestic energy resources, Obama said.

“In his work to promote renewable energy projects on our public lands and increase the development of oil and gas production, Ken has ensured that the department’s decisions are driven by the best science and promote the highest safety standards,” Obama said.

The incoming Senate Energy and Natural Resources Committee Chairman Ron Wyden said Salazar has been a force for bringing people together and coming up with fresh ideas.

“Although he’s returning home to Colorado, I’m going to continue to seek his counsel about how we can build a path forward on vital natural resources and conservation issues,” he said.

He became the fifth member to leave the Obama administration as the President heads into his second term.

Secretary of State Hillary Rodham Clinton, Defence chief Leon Panetta, Treasury Secretary Timothy Geithner and Labour Secretary Hilda Solis had earlier announced to quit the Cabinet.

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