What Counts as Waste

Using natural resources always leaves something behind. Before you can argue about landfills or recycling, you need to be precise about what waste is, where it comes from, and why a rich country and a poor country end up with very different bins.

Sorting waste two different ways

Source and type are two separate questions, and mixing them up is a quick way to lose a mark. “Where did it come from?” is source. “What is it made of?” is type. The same old laptop is domestic by source and e-waste by type.

The three sources

• Domestic waste — generated by households: food scraps, packaging and broken items.
• Industrial waste — produced by factories and industry: chemicals, metals and manufacturing by-products.
• Agricultural waste — created by farming: animal manure, crop residues, and empty containers from pesticides and herbicides.

The three types

• E-waste — electronic waste such as old computers, mobile phones and televisions. It matters because it contains toxic materials including lead and mercury.
• Food waste — edible food that is thrown away, usually because too much was bought or it spoiled first.
• Biohazardous waste — dangerous waste from hospitals and laboratories: medical equipment, needles and blood or plasma samples.

Solid domestic waste

The difficulty with SDW is not the amount, it is the mixture. A single bin bag can hold food, plastic film, a broken toy, a nappy, junk mail and a light bulb. Sorting that mixture into useful streams is slow and expensive, which is why so much of it ends up in landfill even in countries with good recycling schemes.

Common components of SDW:

• Paper — newspapers, magazines, packaging
• Cardboard — boxes and containers
• Glass — bottles and jars
• Metal — aluminium cans and tin containers
• Plastics — bottles, food containers, bags
• Organic waste — food scraps, garden clippings and other biodegradable material
• Packaging — plastic wrap, polystyrene foam, boxes
• Construction debris — bricks and wood from home repairs
• Clothing — old or unwanted clothes and textiles

Why waste volume and composition vary

Four groups of factors. Learn them as four headings and you have the structure for any six-mark question on this.

Socio-economic factors

Wealthier societies generally produce more waste per person, because of:

• Higher consumption levels
• Single-use products
• Excessive packaging
• A culture of convenience
• Fast fashion

For example, high-income countries such as the United States generate far more waste per person than lower-income countries such as India. But there is a twist worth writing down: lower-income countries may produce less waste while having less capacity to manage it properly. Less waste does not automatically mean less harm.

Political factors

Government policy changes both how much waste appears and how well it is handled:

• Recycling laws
• Waste taxes
• Bans on certain materials
• Landfill regulations

Countries with strong waste management policies tend to have less unmanaged waste. The European Union’s ban on single-use plastics, for instance, has cut plastic waste across member countries.

Environmental factors

• Environmental awareness reduces waste through more recycling and composting programmes.
• Geographical location: popular tourist destinations see waste production spike during peak season.
• Seasonality: large volumes of crop waste follow harvest in farming regions.
• Natural disasters generate huge amounts of waste. After a powerful hurricane, rebuilding creates enormous volumes of construction and demolition debris.

Technological factors

Technology cuts both ways, and saying so is what earns the top band.