Forty young people will be planting hundreds of trees in north Cornwall this weekend.
The volunteers will be at Trengayor Woods near Bude for what they call a "vital" woodland regeneration project.
The planting has been organised by Stranger magazine, launched in Cornwall with help from the Prince's Trust.
Editor Helen Gilchrist says the young volunteers want to counter the environmental damage caused by their use of cars.
The volunteers plan to plant 2,500 trees this weekend and 10,000 by the end of the winter.
They say that Cornwall has the lowest amount of trees in the UK and they want to do something to redress the balance.