This effect is called proactive interference.
Proactive interference (PI) is a type of explanation for why we forget or cannot recall information. The PI effect means that forgetting occurs because old memories interfere with our ability to form memories. An example of the PI effect is when you try to learn or memorize a new phone number, however, phone numbers that already exist in your memory interfere with your learning of the new phone number.
Internal humidity can be controlled by: removing moisture at source, for example, using an extract fan in the bathroom, using a rangehood in the kitchen, venting a dryer to the outside and using only externally vented gas heaters. passive ventilation by opening windows.
Answer:
they use books,newspapers,pamphlets and encyclopaedia .
It killed more than 1/3 of Europe’s population. Because so many people died there was very little slaves. The slaves moved to cities where they would get payed to work. Because there was no slaves working in homes the manor system in Europe fell apart and cities began to grow.