Charging coffee lovers for a disposable cup could cut their use "by up to 300 million a year", according to new research.
Plaid and Labour Make Health Pledges
Two Welsh political parties are making promises on health ahead of the general election.
Plaid Cymru say they would recruit a thousand extra doctors and cut GP waiting times.
Labour have a similar plan and say they're the party of the NHS.
Wales First Minister and Welsh Labour leader Carwyn Jones said the system is under growing pressure: "Over recent weeks we've seen unprecedented increases in GP out of hours activity a 20% increase in life threatening calls to the ambulance service and a growing number of patients requiring complex care.
"These are not excuses - they are facts - but the challenge was met."
Plaid Cymru leader Leanne Wood said more staff in Welsh hospitals would make a big difference: "Additional doctors will mean that Wales has an equal number of doctors per head of population as many other countries in the EU, we're way behind at the moment.
"Additional doctors will enable more patients to be seen and it will reduce the pressure on A&E departments."
It's as a poll carried out by Cardiff University has found 53% of people are confident the NHS here would provide a high standard of care if they were ill. 43% said they weren't confident while 4% said they didn't know.
Men are less likely to talk than women with 54% of women having had a conversation compared to 37% of men.
Theresa May has now signed a letter to trigger Article 50, the start of the official process to leave the EU.
An estate agent has been jailed for stabbing a man in Cardiff.
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