Lesson 161 12.2 (cont.)
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What does anthropogenic refer to?
Human-induced It relates to environmental changes caused by human activities.
Define global warming.
Increase in Earth’s average surface temperature Primarily due to greenhouse gas emissions from human activities.
What is the Little Ice Age?
A period of cooler temperatures from the 14th to the 19th century Characterized by a series of colder decades in the Northern Hemisphere.
Carbon Dioxide
What is the primary greenhouse gas associated with fossil fuels? Released when fossil fuels are burned for energy.
Montreal Protocol
An international treaty designed to phase out substances that deplete the ozone layer, adopted in 1987. It has been successful in reducing the production and consumption of ozone-depleting chemicals, leading to signs of recovery in the ozone layer.
1- HCFC’s 2- HFC’s
What are two chemical that replaced CFC’s?
Medieval climate optimum
A warm period during the Middle Ages, approximately from 950 to 1250 AD, characterized by increased agricultural productivity and population growth in Europe. This period is often associated with favorable climate conditions that allowed for the expansion of farming and settlement in previously marginal areas.