1. HUMANS & the ENVIRONMENT

2. Our biosphere provides many goods and services.
These goods may be:
Renewable resources
Nonrenewable resources

3. Renewable resources - is a resource which
can be used repeatedly and replaced naturally
within a reasonable amount of time.
water
trees
sun
wind

4. Nonrenewable resources - is a resource in
which there is a limited supply.
minerals
Fossil fuels – coal, oil, natural gas
Sand, stone
metals

5. Sustainable Resources Use
- to use natural resources to meet our needs
without causing long-term environmental harm.

6. Earth’s natural resources such as soil,
How do human activities affect the environment?
Human activities such as agriculture, development, and industry degrade
Earth’s natural resources such as soil,
water, the atmosphere, and biodiversity.

7. Most human activities involve burning fossil fuels.
Agriculture ---
most farm equipment run on fossil fuel (diesel fuel).

8. Agriculture (continued)
Large areas of land/forest are cleared to plant crops
Habitat destruction; deforestation
Decrease biodiversity
(fewer species; many become extinct)
Less trees, less CO2 absorbed and fixed into
organic compounds, therefore more CO2 remains
in atmosphere contributing to global warming
Pesticides and fertilizers pollute water (rivers, lakes, ocean)

9. Most human activities involve burning fossil fuels.
Development ---
most construction equipment run on fossil fuels(diesel)
Mining

10. Most human activities involve burning fossil fuels.
Industry ---
most factories run on fossil fuels(diesel)

11. Most human activities involve burning fossil fuels.
Businesses and homes ---
run on electricity, most of which is produced by
burning fossil fuels (coal, oil, natural gas)

12. Most human activities involve burning fossil fuels.
Transportation---
most vehicles run on diesel or gas

13. Burning fossil fuels produces many pollutants
such as smog, particulates, and carbon dioxide.
Pollutants are bad for our health.

14. Burning fossil fuels produces carbon dioxide,CO2.
CO2 is a greenhouse gas.
Greenhouse gases trap heat in the atmosphere thereby
keeping Earth warm. But too much CO2 traps too much
heat leading to an increase in the average global
temperature, global warming.

15. The Carbon Cycle
CO2 is taking in by plants and fixed into glucose(organic compound).
Plants, like trees, remove CO2 from the atmosphere.
Plants/trees help to decrease the amount of CO2 in atmosphere
thereby helping to decreasing the effect of global warming.

16. Deforestation - - the clearing/cutting down of forest
- - contributes to global warming because
decomposition and burying produce CO2.
- - there are no trees to remove CO2 from atmosphere.

17. Deforestation - Reduces biodiversity…less species
- Loss of habitat can lead to species extinction

18. Threats to Biodiversity
Humans reduce biodiversity by:
Altering habitats
Hunting
Introducing invasive species
Releasing pollutants into food webs
Contributing to climate change