ISLAMABAD: Prime Minister Imran Khan on Sunday expressed dissatisfaction that Pakistan was at the bottom of the list of countries in terms of ratio of trees per person.

He, therefore, urged the people, especially the youth, to actively take part in the country’s biggest tree plantation campaign, referring to the coming monsoon tree plantation drive in the country under the government’s ambitious Ten Billion Tree Tsunami project and Green and Clean Pakistan initiative.

The prime minister stressed that the countrymen should accelerate their efforts to plant maximum saplings during the campaign.

“I want all Pakistanis, esp [especially] our youth, to gear up for the biggest tree planting campaign in our history. We have a lot of catching up to do,” he said in his tweet along with a graph showing numbers of trees per person in different countries of the world.

“And we will be gearing up this monsoon season for our plantation drive – the biggest in Pakistan’s history,” he said in a related tweet.

According to the graph, the world has 422 trees for every person but in Pakistan, this ratio stands at around five trees per person.

A study in the journal Nature has reported existence of about 3.04 trillion trees on earth. According to another data compiled by different international research bodies, about 50 per cent of these trees in the world are in the five biggest countries, and two-thirds in just 10 countries, leaving only 1,990bn trees for the rest of the world.

‘Tree wealth’, an ecological term, can also be measured in terms of the number of trees per person.