Population and Environment Lecture 3.pdf

The environment and population are intricately linked, facing significant challenges due to various factors such as climate change, global warming, ozone depletion, loss of biodiversity, freshwater supply issues, desertification, and deforestation.

Climate change and global warming are causing shifts in weather patterns and rising temperatures globally, leading to more frequent and severe natural disasters like hurricanes and wildfires. This directly impacts populations through displacement, destruction of homes, and economic instability.

Ozone depletion, primarily caused by human-made chemicals like chlorofluorocarbons (CFCs), threatens human health and ecosystems by increasing exposure to harmful ultraviolet (UV) radiation. This can lead to higher rates of skin cancer and other health issues among populations.

Loss of biodiversity, accelerated by habitat destruction and climate change, undermines ecosystems' ability to provide essential services like pollination, clean air, and water purification. Human populations depend on these services for survival and well-being.

Freshwater supplies are increasingly stressed due to pollution, over-extraction, and climate change impacts like altered precipitation patterns. This scarcity intensifies competition among populations and can lead to conflicts over water resources.

Desertification and deforestation further degrade the environment, reducing available land for agriculture, exacerbating food insecurity, and displacing populations who rely on these resources for their livelihoods.

Addressing these interconnected issues requires global cooperation, sustainable practices, and policies that prioritize environmental protection alongside human welfare. Balancing population growth with environmental stewardship is essential for ensuring a sustainable future for generations to come.

1. Population and Environment
3
rd
Lecture

2. Changes in global
environments
Contents
•Climate change
•Global Warming
•Ozone depletion
•Loss of Biodiversity
•Fresh water supplies
•Desertification and deforestation

3. Environmental
Change
•Environmentalchangeisachangeor
disturbanceoftheenvironmentmost
oftencausedbyhumaninfluencesand
natural ecological processes.
Environmentalchangesincludevarious
factors,suchasnaturaldisasters,human
interferences,oranimalinteraction.
Environmentalchangeencompassesnot
onlyphysicalchanges,butalsofactors
likeaninfestationofinvasivespecies
(Wikipedia).

4. Climate
change
Refers to long term change in
weather (usually increase) in global
temperature.
The greatest challenge facing the
world at the beginning of the last
century, the average global
temperature has risen by 0.75
degree

5. Global
warming

14. Loss of
Biodiversity

22. •thanks