Leader of the Australian Greens Dr Richard Di Natale has announced a new tax on sugary sweetened beverages to help tackle Australia's obesity epidemic.

"We have a major health crisis on our hands with over a quarter of Australian adults and children overweight or obese," said Senator Di Natale who was a general practitioner and public health specialist before he entered politics.

30% of the added sugar kids consume comes from sweetened drinks, contributing to weight gain and a risk of diabetes, in particular for kids.

Australian Greens Leader Dr Richard Di Natale says Scott Morrison's 4-year fiscal plan won't please anyone who values a quality health system.

"This Budget attacks universal dental care, cuts millions out of frontline health services, and contains a Medicare co-payment by stealth," Senator Di Natale said.

"Australians who value a quality health system will not be motivated to vote for the Liberals or Nationals at this election."

MBS indexation freeze: a Medicare co-payment by stealth

The Greens have rejected the Liberals' pre-election promise to change Australia's publicly funded dental care program, warning it will limit patient access.

"This plan is a shocker. If it's allowed to go ahead it will totally undermine the push for universal Medicare funded access to dental care," said Australian Greens Leader Dr Richard Di Natale.

"80 per cent of dental clinics will be off-limits to patients using this program, which relies only on dental systems run by the states.

Australian Greens health spokesperson, Senator Richard Di Natale, said today that the Abbott Government’s heartless budget is extracting $619 million of hard-won funding for dental health.

“The Abbott Government isn’t just making it harder for someone to see their GP, it’s also making it harder for people to see their dentist,” said Senator Di Natale, who negotiated the National Dental Health Reform Package with the previous government.

Australian Greens Leader Senator Christine Milne joined Greens health spokesperson Dr Richard Di Natale in Canberra today to launch the Greens' $9 billion national health package.

"In a caring society, every Australian should have the right to good quality healthcare," Senator Milne said.

"The Greens' national health policy is about making sure that your health doesn't depend on your bank balance or your postcode.

"The Greens stand up for what matters and that's why we've made investment in healthcare a priority for this election."

Every Australian deserves good healthcare. Where you live, or how much money you earn, shouldn't decide how well you get looked after when you are sick. The Greens are standing up for universal, quality healthcare at this election.

We cannot risk Tony Abbott making extreme cuts to healthcare services which will hurt millions of people - but by caving into big business and mining lobbyists, the Labor Party has missed opportunities to raise revenue to fund better healthcare for Australians.