Consider the following statements:
I. Urban waste can be used for energy generation and composting.
II. Only 50% of solid waste in smaller cities and towns is collected and disposed of.
III. Industrial waste in urban areas is primarily dumped into rivers.
IV. Untreated urban waste can release methane into the atmosphere.
Which of the following combinations is correct?
1
I and II only
2
II and III only
3
I, III, and IV
4
I, II, III, and IV