The phrase "green fields" refers to open, lush areas of land covered with thriving green grass or crops. It symbolizes a peaceful, natural, and fertile environment. Full definition
The lush green fields with natural tropical jungle under the bright blue sky will produce the fresh air, entertained by the animal sounds. (lakotour.com)
And how better to dress for Fall perfection than with some plaid mixed with an army green field jacket. (bylaurenm.com)
But now their candidate has admitted that they will concrete over the countryside with their plans for 5,000 new houses on green field sites. (conservativehome.blogs.com)