Four councils will get a share of a £3 million fund to help them meet statutory recycling targets.
The Welsh Government says it'll help invest in new vehicles, containers and depots.
Flintshire, Neath Port Talbot and Wrexham councils along with Newport City Council will receive £3m funding to help them develop services.
Councillor Louise Hughes, of LLanegrin in Gwynedd says the move to a three week black bag collection was a big and expensive mistake.
She said, “It’s ridiculous. They did a questionnaire and had almost 2,000 responses and most people said ‘no way’. I can’t believe they’re going to go ahead, it will be a complete, unmitigated disaster.
“What it will mean especially for coastal towns is seagulls will be ripping open bin-bags. What is the point of consultation and then saying ‘we’re going to do it anyway’?”
The new collection regime will come into force in October and will take 18 months to introduce. Gwynedd County Council says it will save £350,000.
Gwynedd Council has become the first in Wales to introduce black bag collection every three weeks.
Councillors say it'll save £350,000 and recycling and food waste bins will still be collected weekly.
Diana Hulme on Facebook says says, "Do we get a reduction in our council tax to reflect the reduction in the number of collections???? Let me guess...no."
Stephen Giffard on Twitter add, " That's good news for rats I suppose."
Ben Jones on Facebook says, "Living with my partner and a 2 year-old baby and the bin is packed to the top after 2 weeks as it is. We recycle its not as if we just throw everything in one bin!"
Mared on Twitter says, "Disgusting health hazard. Are GCC going to slash the council tax to reflect the loss of services? No, I thought not!"
Dustbins in Gwynedd will be emptied every three weeks instead of fortnightly following a vote by councillors.
The unanimous decision was taken by cabinet members claiming it was a sensible step repeated in other parts of the country.
The new timetable will come into force in October and will take 18 months to introduce throughout the county - it's claimed it will save £350,000.
The council heard that public surveys have shown that half of people anticipate problems with such things as nappy disposing. There were also concerns over rats, smells and bins becoming too heavy.
However there will be no changes to weekly household recycling, and food waste services, and a fortnightly collection of garden waste says the council.
Currently only half of Gwynedd residents use recycling bins.
“We must take steps to persuade those residents who continue to throw waste that can be recycled into their residential waste bins to start using the weekly recycling and food waste services,” says Councillor Gareth Roberts.
Cardiff Council is being criticised for an idea to replace black refuse bags for clear ones in an attempt to expose 'missed opportunities' for recycling.
The council says it must look into all opportunities to maximise the number of people who recycle. But the idea hasn't gone down well with everyone. Critics say it's an invasion of privacy. Megan Boot reports.
Cardiff Council is considering swapping black refuse bags for clear ones, in order to spot missed opportunities for recycling.
It's just one idea being considered as part of a green paper on recycling initiatives that'll be published in the summer.
The council says it must look at all opportunities to maximise recycling.
"It's a very very good way of finding out a lot of information about somebody" says Emma Carr, from Big Brother Watch.
"I think allowing people to see very very clearly who you are as a person when you may feel uncomfortable with that is certainly a step too far".
People in Wales recycled 54% of their waste between July and September 2012.
Conwy topped the table, recycling 60% of its waste during the second quarter of 2012/13, followed by Anglesey, Wrexham, Ceredigion, Caerphilly and Monmouthshire, who all recycled 59% of their rubbish.
48 percent of household waste was recycled or composted in Wales in the 12 months to the end of March 2012, a rise of 4 percent on the previous year, according to a new report published by the Welsh Government. The administration has set a target of 52 percent by 2012-13.
Up to 100 jobs are to be created in Caerphilly with the opening of a new recycling service centre.
Caerphilly is already the head office for DS Smith Recycling's operations, employing 88 staff out of almost 400 across Wales.
The investment, which has received £436,000 from the Welsh Government, will also safeguard 22 jobs.
The centre will be based at Caerphilly Business Park, which the company says will enable it to centralise its IT, HR and finance operations.
DS Smith Plc employs 12,000 people worldwide and has a turnover of £2.5 billion.