2. INTRODUCTION
• Climate change refers to change in average
weather conditions due to factors such as
biotic processes, variations in solar
radiation solar received by Earth and volcanic
eruptions.
• Human activities
• Physical process
3. Introduction....
• Toxicity is the degree to which a substance can
damage an organism such as an animal, bacterium,
or plant, as well as the effect on a substructure of the
organism, such as a cell (cytotoxicity) or an organ
such as the liver(hepatotoxicity).
• Increase in earth temprature
4. EFFECTS OF CLIMATE CHANGE ON ENVIRONMENTAL
DISTRIBUTION AND TOXICITY OF CHEMICAL
POLLUTANTS.
• Interactions of toxicants with environmental
parameters.
• Temprature increases tropospheric ozone
• Pollutants affected include POPs, Air
pollutants.
5. POTENTIAL RISK AND TOXICITY OF
CLIMATE CHANGE TO LIFE
• Affects Human health in Urban and polluted
areas.
• Alters food webs, lipid dynamics, organic
carbon cycling.
• Elevated tempratures may alter
biotransformation of contaminants to more
bioactive metabolites
6. POTENTIAL RISK AND TOXICITY....
• Lead poisoning is particularly detrimental to
the neurological development of children.
• Most exposure is by inhalation of airborne
dust.
• Follows a seasonal pattern do to changes in
temprature
7. POTENTIAL RISK AND TOXICITY....
• Decrease precipitation enhances volatilization
of POPs and other pesticides in atmosphere
• Reduced precipitation also increases air
pollution in urbanised areas.
• Increase Precipitation also leads to enhance
surface deposition of POPs
8. POTENTIAL RISK AND TOXICITY....
• Several POPs have been identified as hormone
disruptors.
• POPS linked to CVD, Cancers, Obesity, diabetes
etc
• Suspected developmental defects in
pregnancy
• Increase storms will lead to increase chemical
contamination of water bodies.
9. POTENTIAL RISK AND TOXICITY....
• PAH inhalation in wildfires or consumption of
contaminated food leads to cancer
• Drought and high tempratures are conducive
to Aspergillus flavus infection and aflatoxin
contamination.
• Aflatoxin is implicated in Liver cancer and
hepatitis..
10. POTENTIAL RISK AND TOXICITY....
• Fumonisin causes esophageal cancer and birth
defects while Vomitoxin causes vomiting,
Anorexia, Growth retardation and
immunotoxicity
• Cholera and Salmonella, could become more
widespread with climate change because of
increased flooding.
11. STRATEGIES TO MINIMIZE TOXICITY OF
CLIMATE
• Mitigation (which involves policies and
interventions to reduce Green House Gas
(GHG) emissions.
• Adaptation (which is based on preparing for,
and minimizing, the predicted impacts of
climate change).
12. • UNFCCC for many years has been focusing on
decreasing gas emissions through the Kyoto
Protocol. It was agreed that countries would
reassess their emission targets for 2020 as
part of the Copenhagen Accord.
13. REFERENCES
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• Arnell, N. W. (2003) Relative effects of multi-decadal climatic variability and changes in the mean
and variability of climate due to global warming: future streamflows in Britain. J. Hydrol. 270(3-4),
195–213.
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change on the fate and behaviour of pesticides in surface and groundwater—a UK perspective. Sci.
Total Environ. 369, 163–177.
• Carrera, G., Fernandez, P., Grimalt, J. O., Ventura, M., Camarero, L., Catalan, J., Nickus, U., Thies, H.
& Psenner, R. (2002) Atmospheric deposition of organochlorine compounds to remote high
mountain lakes of Europe. Environ. Sci. Technol. 36, 2581–2588.
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