As COP26 gets underway we for this week's Country Focus we're at Blas Cymru or Taste Wales event, to discover the appetite for sustainability in the Welsh food and drinks industry . We explore the concept of "Tiny Forests" grown to help combat climate change and biodiversity loss. We visit a church in the Black Mountains, to explore thin places - a veil between this world and the eternal world. Amateur astronomer, Katrin Raynor-Evans guides us through the joys of the night sky and finally root zero, the carbon free potato, grown in Pembrokeshire