3. XIMPROPER WAYS OF WASTE
DISPOSAL
Littering
Open burning
Releasing waste into the river
Releasing gas and smoke into
the air
4. PROPER WAYS OF WASTE
DISPOSAL
Place rubbish in close rubbish bins.
Dispose waste in landfill
Burn waste in incinerator
Treat waste materials before disposing
Fix catalytic converters to motor
vehicles
Filter smoke before releasing to air.
12. ADVANTAGES OF WASTE
DECAYING
Reduces waste
Prevents accumulation of waste
Fertilises the soil when nutrients are
returned to soil
Environmental friendly
Provides biomass energy.
18. Emits foul smell
Emits gas and heat
Attracts pest and rodents
Causes spread of sickness and
diseases
DISADVANTAGES OF WASTE
DECAYING
19. Waste accumulates on the earth
Dead bodies and plants pile up on the
Earth
Cause air,water and land pollutions
Destruction on the habitats of plants
and animals
EFFECTS IF WASTE DO NOT
DECAY
20. No nutrients returning to the soil
and cause plants can grow ell
The survival of plants,humans and
animals will be threatened
EFFECTS IF WASTE DO NOT
DECAY 2