Introduction

Historie – the great horse manure crisis 1894

• In the 19th century, horses were the main driving force behind transport.
• At the same time, the population of the big city is growing very fast.
• Cities have problems with large numbers of animals.

_{http://30494445.weebly.com/
https://ourworldindata.org/co2-and-other-greenhouse-gas-emissions
https://www.businesshorsepower.com/}