英语翻译We've built the "Great Grenn Wall"of three across northe

英语翻译We've built the "Great Grenn Wall"of three across northern part of our country.The Great Green Wall is 7,000 kilometres long,and 1.700 kilometres wide.Itwill stop the wind from moving towards the south.More Great Green Walls are needed.Trees must be grown all over the world.Great Green Walls will make the world better.