The Liberal Democrats have set out a £100 billion spending plan to tackle climate change.
Liberal Democrat leadership candidate Sir Ed Davey has accused the UK Government of putting "the brakes on" renewable energy.
The Government should ban all plastic bags and stop the sale of petrol and diesel cars after 2030, MPs have said.
The Liberal Democrats have performed a U-turn on fracking as the party pledged its Holyrood election manifesto will include a commitment to oppose the controversial practice.
Liberal Democrat leader Willie Rennie has called for tax cuts for the oil industry and low and middle earners in an attempt to steer a centrist path through the left and right-leaning policies of his opponents.