Woodland Trust Cymru have called for thousands more trees to be planted in Wales.
They say Wales has far less woodland than most other European countries and only 14% of Welsh land is covered by trees.
The Welsh Government say they want to create one hundred thousand hectares of new woodland by 2030. This means 5000 new hectares of woodland need to be planted every year.
But Woodland Trust Cymru say only around 1,000 trees are being planted each year.
The situation in Cardiff is better than the national average, according to the charity. It says the “tree cover rate” in the capital is 16%.
But Heini Evans from Woodland Trust Cymru says if new trees aren’t planted in Cardiff soon “…there won’t be anything to replace our mature trees when they have to be felled” leading to a “canopy crisis point”.
She says a reduced number of trees will have a negative impact on Cardiff’s environment, and will lead to more flooding and pollution.
Ms Evans says Woodland Trust Cymru are concerned about money for future tree planting projects.
“With the current political climate, Brexit and policies changing, our funding is on the fence.”
“We are actively pushing for a policy that promotes planting trees in the right places to increase woodland across Wales.”
The Welsh Government were unavailable for comment.