The Federal Government will spend nearly $20 billion over the next five years on environmental measures, according to the Australian Greens.
The Greens claimed they have been leaked details of the budget in what would be a sensational breach of security of the tightly-held documents.
According to a detailed document the Greens have received, $2.4 billion of the $10 billion water plan has been allocated over the next four years. This includes more than $900 million to buy back water licences and more than $1 billion to fund more efficient water infrastructure.
The document also confirms that the solar rebate program would be extended for five years at a cost of about $150 million.
The Greens said the Government spending figures show that the $4 billion would constitute less than half what the Government spends on "handouts" to the fossil fuel industry during a mining boom.