The government must act faster if the UK is to fully benefit from low carbon technology, a report by MPs has warned.
The Energy and Climate Change Committee said in 2008 there were 881,000 green sector jobs - but with extra funding that could rise by 44% by 2015.
But it criticised slow uptake of carbon capture systems, electric cars and home insulation, calling on the government to invest more in the technologies.
The Department of Energy and Climate Change said it was taking clear action.
Committee acting chairman Paddy Tipping MP said: "Investment in low carbon technologies must be seen as key to economic recovery.
"These technologies have the potential to reduce the carbon intensity at every stage of the energy supply chain, resulting in lower emissions, many new jobs and growth for the economy."
The committee found that, while developing low carbon technologies would require government support, they have the potential to create jobs.
Mr Tipping added: "The government should increase the proportion of public money spent on the uptake of low carbon technologies because they have a vital role in the move towards a green economy."
The government has previously said it plans to generate one-third of UK electricity from renewable sources by 2020.
Meanwhile the private sector continues to invest in low carbon technologies, with General Electric announced 1,900 jobs building wind-turbines in Britain last week.
A Department of Energy and Climate Change spokesman said: "We agree that the low carbon sector offers huge opportunities for economic growth and employment in the UK.
"Government's policies are designed to enable the UK to seize the benefits of that growth."
He added: "The government is taking clear action to drive the move to a low carbon economy."