What this lesson teaches
I can evaluate the problems of urban solid waste and the strategies for managing it.
Syllabus 8834, Topic 1.1, 2. Sustainable Cities. Why is effective waste management important for progress towards sustainable urban development?
Make a guess
A rich city collects every household's rubbish twice a week. Has it solved its waste problem?
- Yes, because ordinary waste cannot harm health.
- No, not necessarily. It may still make lots of waste.
- Yes, because the rubbish is collected.
- No, because rich cities collect waste badly and too rarely.
Show the answer
No, not necessarily. It may still make lots of waste.
Good collection is not the same as producing little waste. Richer cities often throw away much more, and landfills and incinerators are costly.
Managing urban waste means dealing with how much is made, whether it is collected and what happens to it afterwards.
Non-hazardous solid waste is ordinary rubbish from homes, businesses and institutions, such as food scraps and packaging. Hazardous waste, like chemicals, needs special handling and is not the main focus here. Even ordinary waste can harm health and the environment if badly managed.
In poorer cities, money, roads or staff may be too limited to collect waste everywhere. Rubbish piles up, blocks drains or is burned in the open. It attracts flies and other disease carriers. Dump runoff can pollute water. Informal waste pickers recover useful materials, but face unsafe work and low pay.
Richer cities usually collect waste reliably, but people throw away much more. Mixed or dirty recyclables are hard to recover. Landfills and incinerators are costly and unpopular. Good collection is not the same as producing little waste.
Waste affects all three parts of sustainability. Clean-ups and illness cost money. Pollution harms the environment. Households without collection, and workers near dumps, suffer most.
- Non-hazardous waste
- Ordinary rubbish from homes and businesses.
- Poorer cities
- Collection often misses some areas.
- Richer cities
- Reliable collection, but more waste made.
Step by step
Find the stage
Making, collecting, sorting or final treatment?
Explain the impact
Health, jobs, drains or ecosystems.
Compare places carefully
Find the real difference in capacity or consumption.
Real examples to use
Payatas, Manila, 2000
After heavy rain, a huge open dumpsite collapsed onto nearby homes, killing over 200 people, many of whom lived by collecting recyclables there.
Worked example: Collection is only one measure
In made-up City A, 60% of waste is collected; the rest may be dumped or burned. City B collects 98% but sends most to landfill. A needs wider, safe collection. B still needs to cut waste and recycle more.
Watch out for this
Ordinary, non-hazardous waste cannot harm health.
It can attract disease carriers, block drains and release pollution when burned.
Check your understanding
Which indicator adds most to waste-collection coverage?
- The number of trucks and workers used each day.
- Waste made per person and the share safely treated.
- The number of new bins bought for each block.
Show the answer
Waste made per person and the share safely treated.
Yes. These show the rest of the waste chain.