HI,My name is:

ASTRI NAPITUPULU (family name)

You can call me “ASTRI”

ＩＮＤＯＮＥＳＩＡインドネシア

Tokyo

Jakarta

7 hours flight

18,307 Islands

!!

300 ethnic groups

My ethnic group:B A T A K

LAKE “TOBA”: World’s largest volcanic

lake

POLLUTION of Lake TOBA:Natural Cause

CAUSE 1:

NATURAL CAUSE: water hyacinth plant

During Rainy Season (October-August):Overpopulation

Overpopulation ofWater HyacinthEFFECT:

degrade water quality by blocking

photosynthesis

greatly reduces

oxygen levels in the water

Threat for fish and

other water plants

POLLUTION of Lake TOBA:Results of Human Activities

CAUSE 1:

DAILYACTIVITI

ES BY PEOPLE LIVING NEARBY

POLLUTION of Lake TOBA:Results of Human Activities HAZARD/ DANGER:

Chemical Compounds from the detergents/ soaps and the dirt/oil

will pollute the lake water

CAUSE 2:

TRASH/ GARBAGE TOSSED AWAY BY:

(1) PEOPLE LIVING NEARBY

(2) PEOPLE PASSING BY

POLLUTION of Lake TOBA:Results of Human Activities

CAUSE 3A:

PIG FARMS

Managed by:

People living nearby

POLLUTION of Lake TOBA:Results of Human Activities

CAUSE 3B:

PIG FARMS

Managed by:

Both Small and big industries

POLLUTION of Lake TOBA:Results of Human Activities

Hazard of:

PIG FARMS

Waste from the pig farms will increase E. Coli contain of the lake water

POLLUTION of Lake TOBA:Results of Human Activities

POLLUTION of Lake TOBA:Results of Human Activities

Thousands of

units!!!

CAUSE 4:

FISH FARMING: CAGE SYSTEM/ “open net-cage fish farms”

Managed by:Both Small and big industries

POLLUTION of Lake TOBA:Results of Human Activities

HAZARDS

1) Fish food contain harmful chemicals that dissolves in lake water

2) Concentrated fish waste

POLLUTION of Lake TOBA:Results of Human Activities

CAUSE 5:

A pulp industry nearby

(Pulp for paper production)

POLLUTION of Lake TOBA:Results of Human Activities

CAUSE 5:

Pulp industry deforestation of forests around the lake

EFFECT:water level of the lake-water changes ecosystem is disturbed

What can local students do?

What can local students do?# READ FOR MORE

INFORMATION CRITICAL

# WRITE (A BLOG)

# DO POSITIVE ACTIVITIES

AROUND THE SITES OF THE LAKE FOR MORE AWARENESS

AND CARE