The historical shift from returnable plastic cups to disposable cups on trains was initially seen as beneficial mainly for reasons of:

An ecosystem consists of all the interacting organisms in an area together with: Science · Our Environment Which of the following are abiotic components of an ecosystem? Science · Our Environment Biotic components of an ecosystem include: Science · Our Environment A garden, with its plants, insects, birds and frogs, is an example of a/an: Science · Our Environment