Scottish Liberal Democrats took to the water on the campaign trail as they outlined plans for a plastic-free Scotland.

The party's campaign chairman Alex Cole-Hamilton took part in a canoe litter-pick down the Water of Leith in Edinburgh on Sunday to highlight the climate emergency.

The Liberal Democrats want to ban non-recyclable single-use plastics and replace them with affordable alternatives, aiming for their complete elimination within three years as a first step towards ending the "throwaway society" culture, with an ambition to end plastic exports by 2030.

They also want to generate 80% of UK electricity from renewables by 2030, ensure all new cars are electric within a decade and ban fracking, amongst other measures.

READ MORE: Fracking to be banned in Scotland indefinitely, leak reveals

Mr Cole-Hamilton said: "We need to act before it is too late. There is no Planet B.

"The Liberal Democrats led the way in tackling plastic waste last time we were in government with the plastic bag levy. Now we want to build on the success of that policy and deliver a plastic free Scotland by eliminating single-use plastics within three years.

"That's just one example of how a Liberal Democrat government led by Jo Swinson would tackle the climate emergency and build a brighter future."

Meanwhile, the SNP unveiled plans to push for a national scheme to help households save hundreds of pounds on their energy bills.

The party said MPs would press for the introduction of a national free switching service, a free service which would be available to everyone to find out what they could save on their bill and help them switch suppliers.

First Minister Nicola Sturgeon joined Kirsten Oswald, SNP candidate for East Renfrewshire on the campaign trail in Clarkston, East Renfrewshire on Sunday.

She said: "If elected, SNP MPs will push for legislation to tackle some of the financial pressures facing families, and which are being made worse by Brexit, including bringing forward a scheme to help households save hundreds of pounds on their energy bills.

"With households spending around 30 billion on gas and electricity each year - an average of around £1,123 - the introduction of a national switching service will help to alleviate some of the financial strains facing households and to ensure people get the best deal possible."

The Scottish Conservatives said that all political parties must do more to encourage women to stand as candidates as the party staged a Scottish Conservative Women street stall in Glasgow.

READ MORE: Record number of women to stand in 2019 General Election

The street stall was arranged to highlight the party's highest number of female candidates at a general election, with 23 women standing in Scotland's 59 seats.

Annie Wells, MSP for the Glasgow Region, said: "There is still much more to be done, but it's good to see progress being made to get more women to come forward to stand as candidates for the party.

"At a time when some women say they are being hounded out of politics, it's vital that parties mentor and encourage more women to come forward and the Scottish Conservatives are committed to doing that."

Scottish Labour said it wants to bring about a transformation in employment rights in Scotland with measures such as creating a Department of Employment Rights and extending statutory maternity pay.