Page 66 - Science Course 3 (Book 1)
P. 66
Mo2-L3a: How Do Humans Affect Ecosystems?
Potential further damage to the ozone layer was Affecting the Environment
avoided by an international treaty called the Montreal
Protocol which phased out CFC use worldwide. The amount of greenhouse gases emitted by a per-
son, an organization, an event, or a product is called
its carbon footprint.
2019 2018 2017 An increase in greenhouse gases is contributing to
global warming—a rise in Earth’s average surface
temperature.
2016 2015 2014
This simulation Concentration of ozone
shows what could
have happened to
Earth’s ozone layer High Low
without the Montreal
Protocol.
Key Concept
How Do Humans Affect Ecosystems? 2011 Global CO Emissions from Fossil fuel
2
Combustion and Some Industrial Processes
In what ways do humans affect ecosystems?
Others EU-28 Japan
China India
United States Russian Federation
Global Greenhouse Gas Emissions by Economic Sector
58
