Chicago Sun Times: 'Global warming threatens Chicago tourism'

'It is happening now and affecting us today...

Unexpectedly cold temperatures, like snow in April and 60 degrees in July, leave out of town guests unprepared to spend much time outdoors exploring Chicago.a wet, cool July...

The long, extreme cold further into the spring causes a drop in sales for group tour business and private events in the early part of the season as people are not yet ready to commit to outdoors activities. A colder Lake Michigan has resulted in fog blocking visibility for sightseeing...

Climate change has brought Chicago unpredictable and increasingly extreme weather.'