Name The Year: Carl Ritter, cofounder of modern science of geography, born.?

Questions

a quarter of russia is covered by----------?

a sizable ---------- tree, during the typical growing season, gives off 28,000 gallons of moisture?

a sizable oak tree, during the typical growing season, gives off ---------- gallons of moisture?

all ---------- in venice, italy must be painted black, unless they belong to a high official?

all gondolas in---------- , italy must be painted black, unless they belong to a high official?