Question

II
Tick (✓) the true statements and cross (X) the false ones.
1. A septic tank can be used to produce biogas.
2. Sludge from sewage can be used to produce manure.
3. If untreated wastewater is allowed to flow into lakes, it will heat the lake water.
4. Chlorine gas kills microorganisms.
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Answer 1

1)TRUE

2)FALSE

3)FALSE

4)TRUE

Answer 2

Answer:

1.check

2.check

3.X

4.check

Explanation:

1.because it is waste from your dirt and others

2.yes because sludge can use in agriculture by fertilizing on cropland

3.i dont think so but it depends of what waste or chemical you flow or mixed in lake

4.because chlorine can kill bacteria and viruses and can kill you because of illnesses in our repiratory