wheelbarrow: small hand-propelled vehicle

railroad tie: support for the rails in railroad tracks

Amazon rainforest: large rainforest in South America

group of humans: any set of human beings

stone: rock; building material

worker: person who works

tram: public transport vehicle running on rails predominantly located on streets

railway: interconnected network of infrastructure and vehicles used for train rail transport

road transport: collective term for all forms of transport which takes place on roads, or (ground) surface, except railroads