In Which Period Was a Mass Extinction Event Least Likely

question 10

Multiple Choice

In which period was a mass extinction event least likely?

• A) Permian
• B) Neogene
• C) Cretaceous
• D) Ordovician
• E) Devonian

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Definitions:

Methyl Bromide

A toxic gas used as a pesticide and for fumigation, known to deplete the ozone layer and hazardous to human health.

PCBs

Polychlorinated biphenyls, a group of toxic chemical compounds known for environmental persistence and health hazards.

Emissions Trading

A market-based approach to controlling pollution by providing economic incentives for achieving reductions in the emissions of pollutants.

Kyoto Protocol

An international treaty that commits its parties to reduce greenhouse gas emissions, based on the scientific consensus that global warming is occurring and that human-made CO2 emissions are driving it.