Mynd i'r afael â newid hinsawdd oedd ar ben yr agenda wrth i  Lesley Griffiths, gwrdd ag arweinwyr cenedlaethol ac is-genedlaethol yn yr Uwchgynhadledd Newid Hinsawdd yng Nghaliffornia.
Tackling climate change was top of the agenda as the Cabinet Secretary for Energy, Planning and Rural Affairs met national and sub-national leaders at the Global Climate Action Summit in California.