QUES: Substances discharged to sewer must be biodegradable German Swedish and Czech customers having legislative requirements to this effect

correct the punctuation.

CORRECTED: Substances discharged to sewer must be biodegradable (German, Swedish and Czech customers having legislative requirements to this effect)

QUES: And additionally lets not forget the best advantage your monthtomonth subscription evaporates never to return In sum as we know using computer to enjoy live TV programs is so easy and more comfortable

correct the punctuation.

CORRECTED: And additionally, let's not forget the best advantage: your month-to-month subscription evaporates, never to return. In sum, as we know, using computer to enjoy live TV programs is so easy and more comfortable.

QUES: In the past decade however satellites have observed a decrease in Greenlands reflectiveness

correct the punctuation.

CORRECTED:
In the past decade, however, satellites have observed a decrease in Greenland's reflectiveness.