⟩ When, in the geological time scale, did dinosaurs first appear
1. Jurassic
2. Triassic
3. Cretaceous
4. Tertiary
Answer: 2
1. Jurassic
2. Triassic
3. Cretaceous
4. Tertiary
Answer: 2
Why waste is considered one of the major environmental issues?
Is pollution always caused by humans?
What is pollution?
What are the main types of waste?
What is the cost-benefit relation regarding sewage treatment as a strategy to fight water pollution?
What is eutrophication?
What is selective waste collection?
What is a biodigester?
What are the environmental harms caused by mercury pollution? What are the main sources of mercury pollution?
What is nuclear pollution?