It would be a mistake to frighten people too much on climate change, despite the challenge the world faces, a key UK adviser on the issue has said.
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Lord Deben said the situation is "catastrophic" but if you scare the public "you don't get people to act".
Instead they say "drink and be merry, for tomorrow we die", he told a group of Senedd members.
Lord Deben chairs an independent committee advising the UK and devolved governments on emissions cuts.
He was giving evidence to the Welsh Parliament's climate change committee.
Last month a landmark UN scientific report warned of increasingly extreme heatwaves, droughts and flooding, and a key temperature limit being broken in just over a decade.
But there is hope that deep cuts in emissions of greenhouse gases could stabilise rising temperatures.
Lord Deben told the committee on Thursday that you have to be "willing to say thank you" for the progress made in the UK over the past decade and "generous in praise for what is being done" now to tackle climate change.
"Then say, 'actually, it isn't enough but we can do what is enough'," he said.
He said the cost of changing behaviour to cut emissions was less than one per cent of the UK's economic output and "perfectly doable", with the private sector having "huge sums of money available".