Write a design brief to explain your solution.

My solution is a recycling bin system designed to help the municipality manage waste more effectively by encouraging separation of recyclables from general waste. It uses color-coded compartments and a foot pedal to reduce contamination and improve collection efficiency.

1. Capacity: At least 100 liters total ($30$L paper, $40$L plastic, $30$L other recyclables).
2. Material: Weather-resistant plastic with UV protection, weighs less than 20 kg when empty.
3. Features: Foot-pedal operated lid, clear labels in multiple languages, easy to empty for municipal workers.

Choose one and develop it.

Sketch 1 (Simple triple bin):
Three side-by-side bins with colors: blue (paper), yellow (plastic), green (other). Foot pedal at base. Dimensions: $1$m high, $0.8$m wide total.

[Simple ASCII sketch - imagine rectangular bins]
+---+ +---+ +---+
| P | | P | | O |
| A | | L | | T |
| P | | A | | H |
| E | | S | | E |
| R | | T | | R |
+---+ +---+ +---+
  ^     ^     ^
 pedal pedal pedal

Sketch 2 (Integrated tower bin):
Single tall tower with internal dividers and rotating top selector for compartments. Solar-powered lock for security. Dimensions: $1.5$m high, $0.5$m x $0.5$m base.

[Tower sketch]
   _____
  /     \
 /  TOP  \
| SELECT |
|________|
| PAPER  |
| PLASTIC|
| OTHER  |
|________|
   ||||
  pedal

3.1 FIRST IDEA (chosen: Sketch 2 - Integrated tower bin):
Developed version: Add solar panel on top ($5$W output) to power LED indicators showing fill levels ($>80$ full lights red). Base with wheels for easy movement by municipality trucks. Cost estimate: $R500$ per unit. This reduces littering and saves collection time by 30%.

Final chosen design: Integrated solar recycling tower bin.