O texto a seguir é referência para a questão.

The Real Harm in Multitasking

By Dr. Travis Bradberry

    You’ve likely heard that multitasking is problematic, but new studies show that it kills your performance and may even damage your brain. Research conducted at Stanford University found that multitasking is less productive than doing a single thing at a time.
    A Special Skill?
    But what if some people have a special gift for multitasking? The Stanford researchers compared groups of people based on their tendency to multitask and their belief that it helps their performance. They found that heavy multitaskers – those who multitask a lot and feel that it boosts their performance – were actually worse at multitasking than those who like to do a single thing at a time.
    Multitasking Lowers IQ
    Research also shows that, in addition to slowing you down, multitasking lowers your IQ. A study at the University of London found that participants who multitasked during cognitive tasks experienced IQ score declines that were similar to what they’d expect if they had smoked marijuana or stayed up all night. IQ drops of 15 points for multitasking men lowered their scores to the average range of an 8-year-old child.

(From: https://www.linkedin.com/pulse/20141008153512-50578967-multitasking-damages-your-brain-and-your-career-new-studies-suggest.)

O texto a seguir é referência para a questão.

More than 100 South African gold miners treated for smoke inhalation

  JOHANNESBURG (Reuters) – Hundreds of South African gold mine workers were rescued and over 100 treated for smoke inhalation after an underground fire, the National Union of Mineworkers (NUM) said on Thursday

  Safety is a huge issue in South Africa’s dangerous deep-level mines and a focus for investors. A spate of deaths at SibanyeStillwater’s gold operations, including a seismic event that killed seven miners in early May, has highlighted the risks.

  In the latest incident, more than 600 miners were initially trapped after a fire broke out at a mine east of Johannesburg operated by unlisted Gold One, NUM said.

  This comes almost two weeks after five miners died in an underground fire at a South African copper mine operated by unlisted Palabora Mining Company in Limpopo

  Company officials could not immediately be reached for comment.

  “As the NUM, we vehemently condemn this kind of incident as it is becoming a trend”, the union said in a statement.

(Disponível em: <https://www.reuters.com/article/us-safrica-mining-fire/more-than-100-south-african-gold-miners-treated-for-smoke-inhalation-idUS KBN1KG294>.)