More than 350 million trees were planted in Ethiopia in just 12 hours in a bid against deforestation from the country's prime minister.
The number planted is believed to be a world record and surpassed an initial goal of 200 million to be planted in a day.
The action, led by prime minister Abiy Ahmed, aims to help restore the country's landscape, which experts say is fast being eroded by deforestation and climate change.
He tweeted on Monday: "Congratulations Ethiopia for not only meeting our collective green legacy goal but also exceeding it."
The prime minister himself had planted trees in Ethiopia's southern region.
The country is in the middle of a tree planting campaign in which it aims to plant four billion trees between May and October.
Agriculture officials stated that so far, more than 2.6 billion trees have been planted across the East African nation.
According to Farm Africa, an organisation involved in forest management in Ethiopia, less than four per cent of the country's land is now forested, a sharp decline from around 30 per cent at the end of the 19th century.
Often cited as the causes for rapid deforestation in Ethiopia are its rapidly growing population and the need for more farmlands, unsustainable forest use and climate change.
Various international organisations and businesses have joined the tree planting spree along with members of the public.
It is not yet clear if Guinness World Records is monitoring Ethiopia's the mass planting scheme.
However, the prime minister's office said specially developed software is helping with the count.