A leading Muslim businessman predicts Australia's white race will become extinct within 40 years because Australian men are too busy smoking, drinking beer and taking drugs to procreate.

Halal certification boss Mohamed Elmouelhy told his Facebook followers Australian women needed Muslim men to 'fertilise them' and 'keep them surrounded by Muslim babies'.

Mr Elmouelhy made the comment after Hebrew University in Jerusalem published research which showed sperm counts in men from Australia, New Zealand, North America and Europe had declined by more than 50 per cent in less than 40 years.

Muslim businessman Mohamed Elmouelhy says Australia's white race will die out in 40 years

Halal Certification Authority boss says Australian women need Muslim men to fertilise them

'Your men are a dying breed, Australian women need us to fertilise them and keep them surrounded by Muslim babies while beer swilling, cigarette smoking, drug injecting can only dream of what Muslim men are capable of,' he said.

'Muslims have a duty to make your women happy.'

Mr Elmouelhy, who is the president of Halal Certification Authority, said Australia's white race 'will be extinct in another 40 years' if the country is 'left to bigots'.

The Muslim businessman called on these 'bigots' to kill themselves or plan to die.

Mohamed Elmouelhy says Australian men are too busy drinking beer to be future fathers

The halal businessman also called on 'bigots' to choose a cemetery plot or commit suicide

'Because you are declining, better go choose a plot for yourself at your local cemetery,' he said.

'If you can't afford it, commit suicide. It is a cheaper alternative for bigots.'

The Hebrew University-Hadassah Braun School of Public Health and Community Medicine in Jerusalem found male fertility had sharply declined by more than 50 per cent in less than 40 years in Western nations, including Australia.

Halal Certification Authority president Mohamed Elmouelhy weighed into the sperm findings

The Muslim businessman says drug use among Australian men would see white race die out

The analysis did not explore reasons for the decline in sperm counts, but researchers have previously cited links to certain chemicals and pesticides, smoking, stress and obesity.

This suggests measures of sperm quality may reflect the effects of modern living on male health and act as a 'canary in the coal mine' signalling broader health risks.

'This study is an urgent wake-up call for researchers and health authorities around the world to investigate the causes of the sharp ongoing drop in sperm count,' said Hagai Levine, who co-led the research.

Mr Elmouelhy's latest post comes just days after he predicted more non-Muslims in Australia would be eating more halal food than ever.

The 2016 Census revealed that Muslims made up 2.6 per cent of the Australian population, up from 2.2 per cent in 2011.

Australia's Muslim population soared to more than 604,000 people, overtaking Buddhism as the most popular non-Christian religion, and marking a significant jump from 341,000 a decade earlier.