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100

raised flower beds in a backyard

physical geography

100

jet lag

time related changes

100
high air pollution forcing a person with lung disease to stay indoors

human-caused events

100

sunny day requiring use of sunglasses

climate

100

vibration of a cell phone indicating a text message

sound & vibration

200

universal access playground where children with mobility impairment can play

population

200

heavy perfume use by a family member causing an asthmatic reaction

air quality

200

barometric pressure causing a headache

natural events

200

darkness requiring use of a reading lamp

light

200

Accessible dock at a local river park demolished to make way for a new bridge construction project

human caused events

300

non shedding service dog

flora (plants) and fauna (animals)

300

local stream cleanup by Boy Scouts during a community service day project

physical geography

300

smoking area outside an office building

air quality

300

rain shower prompting a crew of road workers to don rain gear

climate

300

hearing loop installed in a synagogue for congregation members with hearing aids

population

400

office with ample natural light

light

400

bell signaling the start of the school day

sound and vibration

400

flood of a local creek damaging neighborhood home

natural events

400

quitting time at the end of a work shift

time related changes

400

family-owned herd of cattle

flora (plants) and fauna (animals)

500

summer solstice

time-related changes

500

unusually high temperatures turning a community ice skating pond to slush

climate

500

tree shaded, solid-surface walking path enjoyed by older adults in a senior living community

population

500

hurricane devastating a low-lying region

human caused events

500

high incidence of respiratory diseases near an industrial district

air quality