4. • Identifiable change in the climate of Earth as a whole that
lasts for an extended period of time (decades or longer)
• When due to natural processes, it is usually referred to
as global climate variability
• Usually refers to changes forced by human activities
that change the atmosphere
Global Climate Change
5. • Over the last 100 years,
since the industrial
revolution, greenhouse
gases have rapidly
increased in the
atmosphere
• This is due to human
activities which release
greenhouse gases
Human activity
7. • More greenhouse gases trap
more heat in the atmosphere,
leading to global warming
• Since 1880, global temp has
increased by almost 1°C
• How much this rises depends
on how much more greenhouse
gas is released
GLOBAL WARMING
11. • Warming and sea level rise will
continue and will probably occur
more quickly than what we’ve
already seen
• Even if greenhouse gases are
stabilized, this will probably
continue to occur for centuries
• Some effects may be permanent
12. • Coral systems and other unique
ecosystems cannot handle
higher temperatures well
• Wildfires will increase
• Up to 30% of species will be at
increased risk for extinction due
to the rapid changes in their
ecosystems
Effects on Ecosystems
13. • Changing seasons
• Drier & longer droughtS
• Increased temperatures & heat waves
• Melting glaciers & polar ice
• Sea level rise
• More intense rainfall & increased likelihood of floods
• Extreme winds & stronger storms
Here are some climate & weather
events impacted by climate change
18. • Deforestation is the purposeful clearing
of forested land.
• Forests have been razed to make
space for agriculture and animal
grazing, and to obtain wood for fuel,
manufacturing, and construction.
What and Why?
19. • Deforestation can result in more carbon
dioxide being released into the
atmosphere.
• That is because trees take in carbon
dioxide from the air for photosynthesis,
and carbon is locked chemically in their
wood.
Consequences of de deforestation
