question:
Despite this, ducks did not appear in agricultural texts in Western Europe until about 810 AD, when they began to be mentioned alongside geese, chickens, and peafowl as being used for rental payments made by tenants to landowners.
Where ducks ever used as a type of commerence in the world?

answer: yes

question:
They can indicate that the start of the Julian year has been adjusted to start on 1 January (NS) even though contemporary documents use a different start of year (OS); or to indicate that a date conforms to the Julian calendar (OS), formerly in use in many countries, rather than the Gregorian calendar (NS).
When was the Calendar act enacted?

answer: no

question:
The lowering of the diphthongs has long been current in many Dutch dialects, and is comparable to the English Great Vowel Shift, and the diphthongisation of long high vowels in Modern High German, which centuries earlier reached the state now found in Polder Dutch.
What researcher posited that the lowering of diphthongs is "natural"?

answer: no

question:
Renewable energy is also the most economic solution for new grid-connected capacity in areas with good resources.
What is the most economic solution for new grid-connected capacity in areas with good resources?

answer:
yes