Summary Notes

2. What are greenhouse gases?
• Chemical compounds in the atmosphere
Eg: carbon dioxide
methane
cfcs
nitrous oxide
ozone
These gases act as greenhouse gases.

3. What do they do?
These gases allow sunlight to enter the
atmosphere freely.greenhouse gases absorb
the radiation and trap the heat in the
atmosphere

4. What is global warming?
• Increasing the earth’s temperature,
especially a sustained increase to cause
climate change.

6. What is global change?
• Environmental change that occur around the
earth in response to a combination of
factors.
eg: sea level rising

7. What is climate change?
• Regional change in temperature and
weather patterns.
• Has a link with human activity specially the
burning of fossil fuels.

8. What causes climate change?
Gases such as carbon dioxide and
methane(known as two of the greenhouse
gases) trap some of the heat from radiation
into the atmosphere. The concentration of
the gases increases as a result of human
activity and therefore it causes the global
temperature to increase and climates to
change.

9. What is human activity?
• Burning of coal, oil, natural gases as well as
cutting down trees(deforestation) are known
as human activities.these alter(change) the
composition of the atmosphere and add to
climate change.

10. What has human activity caused?
• Increased the atmospheric concentration of
a number of greenhouse gases. Such as:
carbon dioxide
methane
nitrous oxide
chlorofluorocarbons
ozone

11. • Increasing the levels of
greenhouse gases in the
atmosphere human activities are
strengthening earth’s natural
greenhouse effect.

12. Burning of coal,oil,natural gases!!
Every time we drive a car, use electricity
from coal-fired power plants, or heat our
homes with oil or natural gas we release
carbon dioxide and other heat trapping
gases .

13. Deforestation!!!
Second most important
source of greenhouse gases

14. Various agricultural and industial
activities:
Are changing the earth’s
composition of the atmosphere
and adding to climate change.

15. • Carbon dioxide
• Methane
• Nitrous oxide
• Chluroflucarbons
• Ozone in lower parts of
atmosphere

16. Scientists!!!
• They believe that combustion of
fossil fuels and other human
activities are minors
• Plant respiration and
decomposition of organic matter
release TEN times more carbon
dioxide.

17. The amount of gases grows,
more heat is trapped by the
atmosphere and less escapes
back into space.this can cause
changed weather patterns and
may cause severe storms.

18. Coastal erosions!!!
• Coastal erosion occurs mostly
in the Waikato region.
• Coastal development has
occurred too close to the sea.

19. • Global warming effects
may cause rise in sea
level in our coastal
marine area.

20. When these natural processes
interfere with our coastlines they
get exposed to storms and
flooding.

21. Two types of coastal erosion:
• Short-term erosion
• Long-term erosion

22. Coastal pressures!!!
• Damage or loss of sand dunes
• Damage to sand dune vegetation
• Removing coastal plants and trees
• Global warming( sea level rise)
• Removal of sand

23. Actions!!!
• Managing coastal hazards
carefully
• Putting sign boards
• Building sea walls
• Advertisements

24. Conclusion!!!
• I personally think that beaches are a
natural resource for us for enjoyment
and for a long term sustainability of the
Waikato coastline I think people should
be protecting them from coastal
hazards rather then exposing it to
coastal hazards.