original: some trails are designated as nature trails , and are used by people learning about the natural world .
simplifications: people learn about the matural world while treading along paths that are called as nature trails . some trails are named as nature trails . poeple use them to learn about the natural world . some trails are marked as nature trails , and are used by people learning about nature . some trails are labeled as nature trails , and are used by people learning about nature and the environmenet . 1 . some trails are set aside and named as nature trails , and are used by people learning about the natural world . some trails are designated as nature trails . some trails are designated as nature trails , and are used by people learning about the natural world . some trails are set to be nature trails , and are used by people learning about the natural world .