The Prime Minister is set to urge Britain that action is needed immediately to save wildlife and habitats. He will warn that the county’s natural environment is disappearing at a “frightening rate”.
Mr Johnson will make his pledge during a virtual event held by the United Nations.
He is promising to pledge an extra 400,000 hectares of land in the next decade.
The Prime Ministers plans will increase the amount of protected land in England from 26 percent to 30 percent by 2030 which includes national parks and areas of outstanding beauty.
Mr Johnson will say: “We cannot afford dither and delay because biodiversity loss is happening today.
“Left unchecked, the consequences will be catastrophic for us all.
“Extinction so out action must be immediate.”
The additional 400,000 hectares of land is the equivalent size of the Lake District and South Downs National Parks combined.
Mr Johnson is set to add: “We must turn these words into action and use them to build momentum, to agree ambitious goals and binding targets.
“We must act now, right now.”
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Martin Harper, director of global conversation at RSPB, said that a 30 percent commitment could be a “huge step towards addressing the crisis our wildlife is facing”.
But he did warn that “targets on paper won’t be enough”.
He added: “Those set a decade ago failed because they weren’t backed up by action.
“This is why the 30 by 30 promise must now be put into domestic law, as part of a suite of goals to restore the abundance and diversity of our wildlife, in every country in the UK.”
Craig Bennett, CEO of The Wildlife Trusts, said Mr Johnson’s promise is a “good start”.
But he also said that more action is needed on the ground to “deliver on the ambition set out by the Prime Minister, and to put nature into recovery”.
He added: “This means rescuing the wildlife sites currently in decline, while also making more space for nature through a new wildlife designation called Wild Belt, specifically aimed at putting nature in recovery, protecting and connecting nature right across the country.”
Tanya Steele, WWF-UK chief executive, said: “This announcement is a welcome step, but it must be backed up by urgent ambition, including strong legislation to avoid damaging trade deals and to stop the food we eat from destroying the environment here and abroad.
“Only then can we meet our climate targets, put nature on the path to recovery and set our sights on global leadership at Cop26.”