1. How Much Methane Do Cows
Release And What Effect
Does It Have On The
Environment?
By Leif Logie

2. How Much Methane Does A Cow
Release?
• one cow produces approximately 214kg
a year
• they release about 58g of methane a
day.
• total global methane release a day is
about 760 million kg (based on 1.3
billion cows in the world).
• total annual global methane release
is about 280 billion kg.

3. Do Cows Contribute To Global
Warming?
• methane is a greenhouse gas
• It is 23 times more effective than
carbon dioxide at keeping heat in the
atmosphere.

4. Is The Methane Released By
Cows Strong Enough To Harm
Animals Near By And If So
How?
• It is not concentrated enough to
actually harm any animals
• Under certain circumstances it
might be harmful.

5. Is there any way to reduce
the environmental impact of
methane released by cows?
• There is way of growing different
types of grass that can help.
• Some farmers take the methane out of
cow dung and use it.

6. Interesting Facts
• As I was searching for this
information I saw a range of
statistics for how much methane cows
release
• Almost all of the methane released by
cows is not actually farted
• The top 2 countries with most cows in
the world are
– Brazil,
– India,

7. conclusion
I chose this project to see which of
the myths and legends are true, and I
am rather impressed by my results.

8. Bibliography (Page 1)
• How Stuff Works, AdiscoveryCompany, (17 June 2003), Do
cows pollute as much as cars, 23/8/2012
• http://science.howstuffworks.com/environmental/life/zoo
logy/mammals/methane-cow.htm
• Department of Primary Industries (State Government of
Victoria), (29th may 2012), reducing methane emissions
from dairy cows, 22/08/2012,
http://www.dpi.vic.gov.au/agriculture/about-
agriculture/newsletters-and-updates/newsletters/how-
now-gippy-cow/september/reducing-methane-emissions-
from-dairy-cows

9. Bibliography (Page 2)
• Small-M, Wordpress, (8th April 2007), Top 15
Country on Highest Number of Cattle, 23/8/2012,
quoting Global Livestock Production and Health
Atlas (2003)
http://micpohling.wordpress.com/2007/04/08/world-
top-15-country-on-highest-number-of-cattle/
• Time For Change, Juerg Rohrer, (before 23
September 2008), Are cows the cause of global
warming, 23/8/2012
http://timeforchange.org/are-cows-cause-of-global-
warming-meat-methane-CO2

10. Bibliography (Page 3)
• Queensland Government, (12 March 2007),
glossary, 16/09/12,
http://www.brisbane.qld.gov.au/documents/plans
_strategies/abbreviations_glossary_references_
climate_change_energy_taskforce_report.pdf
• Australian Institute of Energy, AIE, (14
October 2009), fact sheet 8; biomass,
16/09/12
http://aie.org.au/Content/NavigationMenu/Resou
rces/SchoolProjects/FS8_BIOMASS.pdf