Forty-five nations will pledge on Saturday to step up protection of nature and overhaul farming to cut greenhouse gas emissions, Reuters quoted the British hosts of the COP26 U.N. climate summit as saying. With a rising world population, an official statement issued in Glasgow said it was vital to curb global warming stoked by farming, deforestation and other land use changes that account for about a quarter of humanity's planet-heating emissions. On Saturday, the COP26 talks will focus on ways to enlist nature to keep alive a goal of limiting the rise in global temperatures to 1.5 degrees Celsius (2.7F) above pre-industrial times, the toughest ambition of the 2015 Paris climate agreement. Average surface temperatures are already up about 1.2C. "To keep 1.5 degrees alive, we need action from every part of society, including an urgent transformation in the way we manage ecosystems and grow, produce and consume food on a global scale said UK Environment Secretary George Eustice. "We need to put people, nature and climate at the core of our food systems," he added. The statement said 45 governments would "pledge urgent action and investment to protect nature and shift to more sustainable ways of farming." Backers include major economies led by the United States, Japan and Germany and developing nations such as India, Indonesia, Morocco, Vietnam, Philippines, Gabon, Ethiopia, Ghana and Uruguay. The statement did not give the total amount of funding, but said the measures would include "leveraging over $4 billion of new public sector investment into agricultural innovation, including the development of climate-resilient crops and regenerative solutions to improve soil health". Among the measures, Britain said it would give a 500-million-pound boost to protect more than 5 million hectares - equivalent to more than 3.5 million football pitches - of tropical rainforests and create thousands of green jobs across Africa, Asia and Latin America. Greenhouse gas emissions from land use range from carbon dioxide released by the burning of forests to clear land for farming, to methane from cows and other livestock as they digest food.