MADRID (REUTERS) - Spain's Socialist government announced a 47 billion euro (S$72 billion) public investment plan on Wednesday (Feb 20) to tackle climate change over 10 years, which would be partly financed by issuing green bonds.

The proposal, which sets a goal to make Spain carbon neutral by 2050, is a statement of intent as the government faces a general election on April 28.

Prime Minister Pedro Sanchez said the plan would also be partly financed by EU funds but did not give details.

The draft package includes a plan to offset job losses in polluting industries.

"We aren't proposing anything fanciful," Sanchez told a news conference at the energy and environment ministry, which he merged when he took power in June.

"It's necessary and moreover it's possible," he added.

As well as a draft law, the package includes a delayed national plan to combat climate change, which is due to be approved at a cabinet meeting on Feb 22 and sent to the European Union for its sign-off.

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While there is probably time for the plan to be sent to Brussels, April's snap election makes it unlikely the draft bill will be approved under the current government.

The government will set out a calendar of capacity auctions to work toward a target of producing 74 per cent of Spain's electricity from renewable sources by 2030 and 100 per cent by 2050, it said in a statement.

European Union climate chief Miguel Arias Canete has called on Europe to cut net greenhouse gas emissions to zero by 2050.

Overall, Spain's plan will generate investment worth 200 billion euros, the government said, and should cut its reliance on imported energy to 59 per cent from 74 per cent over the decade.

This would help the state save 75.4 billion euros in fossil fuel costs over the next 10 years, it said.

Sanchez's Socialists are leading in opinion polls ahead of the election but the polls forecast the party will fall well short of a majority in the 350-seat parliament.