Coal mining declined in wales because

I think it is because industries did not apply/execute present-day technologies.

Ibelieve it is the 2nd answer, create gardens on all rooftops. let me know if this .

Humid continental climate is found in the interior of continents between the 30 and 60 degrees latitude, but usually above the 40 degree line.   40 degrees north of the equator means less direct sunlight and therefore less warmth.   this climate is mainly found in the northern hemisphere since there are no major landmasses in the southern hemisphere.  if you live in northern indiana, you know all about humid continental because that is the climate type you have!