The Liberal Democrats have pledged to put protecting the environment "at the heart of government" if they achieve electoral success on May 6.

Party leader Nick Clegg said the next government will be the last that is able to stop "dangerous" climate change.

Mr Clegg said: "That is a huge responsibility for the party that wins this election. But it's an even bigger responsibility for the voters that will choose them on May 6."

The Lib Dems last week outlined plans for a £3.1 billion package to create thousands of "green" jobs. They also propose a UK infrastructure bank to finance environmentally-friendly projects.

The party would also press to go beyond current European Union plans by pushing to limit emissions by 30% by 2020.

Mr Clegg said: "This election is not like any other. Climate scientists tell us that the next government will be the last that can stop dangerous climate change."

He added: "So my message is this: don't settle for a Labour Party that has had 13 years to deliver on the environment and has failed.

"Don't settle for a Conservative Party that talks the talk on green issues, only to align themselves with climate change deniers in the European Parliament.

"And don't give your vote to a Green Party that cannot make a difference in Westminster. Instead, choose the only party that was taking a stand on saving the planet well before it became fashionable."

He continued: "Something really exciting is happening in British politics. This is a huge opportunity to set Britain on the road to a prosperous and green future. We should seize it."