Please enable JavaScript.
Coggle requires JavaScript to display documents.
28.Man's Impact On His Environment :red_flag: :star::+1: - Coggle…
28.Man's Impact On His Environment :red_flag: :star::+1:
How man interact with Environment
man needs
natural resources
from environment
need resources to obtain energy, food and materials
Positive Impact
we can use 3rs, reduce, reuse, recycle :fire: P221
dispose rubbish, keep environment clean and take public transport
conservation, reforestation
protect wildlife, conserve natural habitats and preventing overfishing
negative impact
Depletion of National Resource
use metals and minerals
once used, cannot be replaced
use fossil fuels
overfishing cause fish to be endangered or extinct
deforestation
Why deforestation?
forest cut down for wood
produce furniture and paper
to provide land for farming and building
allow people to dig up fuels and minerals
For farming and building
Consequence of deforestation
plants and animals may die due to burning
co2 is given off, causing global warming
No plants to hold soil together
soil erosion
Soil blown away by wind
Fewer trees to absorb water from ground
less water vapor, less rain, land becomes dry
causes many organisms like snakes and birds to lose their home
What is deforestation?
deforestation is the clearing of large areas of forested land by cutting and burning trees
pollution
cause any substance to make the environment dirty or harmful to live in
can pollute land, air and water
Chemicals
chemicals washed into ocean and might harm ocean life
Yue Qiao, used in appliances
Yue Qiao cause ozone layer to deplete
untreated human waste cause water to be undrinkable
smoke by burning oil, coal etc.
Cigarette Smoke
haze, burning forests
acid rain, kill trees and aquatic organisms
Litter
global warming
co2 is trap in earth, cause earth to be warm
known as greenhouse effect, prevent earth from freezing
given off as a result of deforestation and :fire:of fossil :fuelpump: