Illegal logging has eviscerated Cambodia's forests - destroying around a third of the total in the country in the past 30 years

Cambodia's prime minister has ordered a million hectares of forest be included in protected zones as the country faces one of the world's fastest deforestation rates.

The move, which covers five new areas of forest, will bump Cambodia's conservation zones up by a fifth, bringing more than a quarter of the country's land under protection.

"The Ministry of Environment must...list the five forests as protected areas," said the order signed by Prime Minister Hun Sen, which was seen by AFP on Saturday.

The new conservation areas will include parts of Prey Lang—a forest where activists have long been risking their lives to expose the illegal logging that has eviscerated Cambodia's forest cover.

The lucrative trade, lubricated by violence and bribery of forestry officials and border guards, has seen around a third of the country's forests cleared in the past thirty years.

Hun Sen has been in power throughout that time, but conservationists say he has made little headway in reducing illegal logging despite trumpeting several crackdowns.

His government has been criticised for allowing firms to clear hundreds of thousands of hectares of forest land—including in protected zones—for everything from rubber and sugar cane plantations to hydropower dams.

Other forests named in the new order are Prey Preah Roka, Prey Siem Pang Khang Lech, Prey Chrak Robeang Khang Tbong and Prey Veun Sai —all of which were previously administered by the Ministry of Agriculture, Forestry, and Fisheries.

The NGO Conservation International welcomed the new protections, calling the decree a "bold move".

"These sites represent the most important forests in Cambodia for biodiversity conservation and support of human wellbeing, and if managed correctly could lead to a paradigm shift in Cambodia's development pathway," said Tracy Farrell, the regional director of CI's Greater Mekong program.

According to the organisation, Cambodia's forests provide refuge to over 800 globally threatened species, more than half of which depend on forests to survive.

Last week Cambodian authorities banned a documentary about a high-profile land activist, Chhut Vuthy, who was shot dead by a military policeman while investigating deforestation in a remote forest in 2012.

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© 2016 AFP