Brown, who assumed office in 2011, signed a law requiring the state to reduce greenhouse gas emissions to 40 per cent below 1990 levels by the year 2030.

The state also established a committee that will focus on climate change policies to ensure transparency and accountability in programmes aimed at reducing greenhouse gas emissions.

Greenhouse gas emissions in Los Angeles have already been reduced by 20 per cent since 1990, figures claim.

In a statement, Governor Brown called the new laws "far-reaching moves that continue California on its path of vast innovation and environmental resilience".

California, the world’s sixth largest economy, "continues to set the most progressive environmental protection agenda in the United States", it is claimed, despite 2030 estimates projecting 13 per cent population growth to 44 million.

With the rise of California’s clean technology boom, LA 2024 is aiming to stage the first ever "energy positive" Games through sustainability initiatives across areas such as transportation, venue operations and community engagement programmes.

“I would like to applaud Governor Jerry Brown, Senator Fran Pavley, Assembly member Eduardo Garcia, Senate President pro Tempore Kevin De León, Assembly Speaker Anthony Rendon and the California legislature for adopting the most ambitious greenhouse reduction legislation in the United States," said LA 2024 chairman Casey Wasserman.

"This progressive legislation demonstrates once again that California is a pioneer in sustainability, with funding mechanisms in place to set the global agenda.

"In a forward-thinking mega-city like the new LA, the challenge to remain environmentally friendly never ends, so sustainability and conservation are at the forefront of LA 2024’s planning and our culture as a bid."

Budapest, Paris and Rome are also bidding for the 2024 Games - with a decision due to be announced by the International Olympic Committee in September next year.