The Department for Environment, Food & Rural Affairs (Defra) has handed the waste and recycling brief to Rory Stewart.
The MP for Penrith and The Border was appointed as Parliamentary under Secretary of State last month following the general election but his responsibilities hadn’t been confirmed.
Mr Stewart, who replaced former Liberal Democrat Minister Dan Rogerson, is one of three ministers charged with overseeing policy at Defra.
He has the lead responsibility for the Environment Agency, Natural England and the Forestry Commission as well as natural environment, floods and water and resource and environmental management.
Liz Truss was re-appointed as Defra’s Secretary of State while George Eustice became the new minister following Prime Minister David Cameron’s reshuffle last month.