Lec 1: so we have problems...environmental problems, like no other population before, we
have fixed more nitrogen than the world combined and we have a 30% increase in co2 since
the industrial revolution. We are the cause of bird and amphibian extinction—thier
extinction is due to environmental factors which in turn the environmental hazards thta
can affect our health. More than ever before our environmental crisis has now become
GLOBAL at this era. The two factors that are tha main cause to all environmental
degradation are are – population growth AND Industrialization. However the rate of
industrializastion has by far, increased than the population growth. This is bad coz increase
in doubled concentration of methane(green hse gass) & CFCs-> long-lived ozone destroying.
We also emitted sulphur and nitrogen cuases acid rain
Ecosystem health- humans are participants in complex eco-systems and their potential for
health is propotional to the health function of the ecosystem. Health effects from
environment are indirect and difficult to asses . exposure to UV light leads to skin cancer
1)POPs persistant organic pollution- medical waste-major source of dioxine and
mercury release to the environment. Ex. Dioxin, PCBs, pesticides> chlorinated
2)Endocrine distruption- organic pollutants thta block or imitate actions of
hormones..they cause disruptive and nuerodevelopmental disturbances.
Really cold so they used coal to heat homes and used in industries!!-coal gave out sulphur
Alot of sulphur oxide-reacted with the VERY thick fog-water droplets=sulphuric acid.
First time it exceeded the nature’s capacity of sulphuric acid. After 2 yrs book was
published—shows significant increase in sulphuric acid and smoke.(look at graph)
4000 deaths directly related to smoke.
Cause: forest fires-enormous size. 1997 and again in 1998(alot of heat)