We've planted plenty too. Only 250 square miles worth at kielder.
That's what, 16 miles square?
No, 250 square miles is still 250 square miles, not 16 square miles. It might be 16 miles on one side (it isn't, as it's not a square), but the area is still 250 miles
2. Miles are the same in the USA and the UK.
Cook County Illinois alone, the most populated county in Illinois (5.2 million people) and which includes Chicago, has 106 square miles of forest.
Cook County Illinois, Google informs me, is 1,635 miles
2 and so 106 miles
2 of forest is 6.48%. Great Britain is 230,000 km
2 with 23,000 km
2 of forest, or 10%. By that comparison, one which you chose, we have almost twice the forest by area which Cook County Illinois does.
Obviously Cook County Illinois is not representative of the whole USA, so I sought out this
Wiki page which informed me that around 8.5% of the landmass of the USA is forest. I also found another
page which estimated the total forested area at 747 million acres, less than the 769 million acres used in the Wiki page. Finally, I came across a
which appears to be more authoritative which gave the amount of forest land in the USA at 10%, exactly the same as the UK.
Obviously it would be foolish would think that we would have the same absolute amount of forest over here; the landmass of the USA is approximately 40 times as big as Great Britain. GB has a population density of 260 people per km
2, USA only 34 people per km
2 so you have more space.
It would, however, be absolutely incorrect to suggest that GB has less forest proportionately to the USA. Most estimates I found via Google suggest that GB has a greater proportion of land as forest, one page put the proportion as the same.
I hope this helps dispel any lingering thoughts you might have had about Britain or the UK suffering from a lack of forests. Rejoice, for we have lots.