1. bacteria transform this inorganic mercury into methyl mercury
2. Bakun Dam
2.1. High energy
2.1.1. - to meet anticipated demand
2.2. water reservoir
2.2.1. domestic and industrial use
2.2.2. irrigation
2.2.3. flood control
2.2.4. hydropower
2.3. prevent flood
2.3.1. large capacity
2.3.2. water build up behind dam
2.3.3. form reservoir and steadily drained at a controlled rate over time
3. Balui river
3.1. structure altered
3.1.1. downstream river bank
3.1.2. riverside woodands
3.2. impact
3.2.1. eroded by several meters within the decade
3.2.2. the damage can extend for tens or even hundreds of kilometers
3.2.3. could possibly affect Rajang river
3.3. oxygen concentration
3.3.1. lower flows reduced velocities result in higher river residence times
3.3.2. enhance the potential for algae and cyanobacteria
3.3.3. reduce dissolve oxygen levels.
3.4. approaches
3.4.1. dissemble old and outdated dams
3.4.2. make existing hydroelectric dam more efficient
3.4.3. build dam at site that result in the least amount of environmental and societal damage .
4. Aquatic Organism
4.1. water salinity
4.1.1. high evaporation of water
4.1.2. water salinity increase
4.2. fertilizers and pesticide
4.2.1. rain carry nitrogen & phosphorus into river
4.2.2. kill aquatic organisms
4.2.3. algae population
4.2.3.1. block oxygen
4.3. chemical contaminate the dam and alter the food web
4.3.1. accumulation of mercury in fish
4.3.2. mercury presents inorganic form in soils
4.3.3. methyl mercury absorb by plankton and other creature and pass up in food chain and concentrated in bodies of animals