how3 do you get past the global warming era on simcity creatoe

If your talking of the symbol of age u have tounlock in in callenge mode

new buildings are unlocked by getimg lots of sims in the city and get more approval rating
[the red circle or white if starting approval] and then u unlock new buildings and if
half ful approval u can get the symble of age

i dont know dude,im having the same problem

i've beaten global warming and was goffing around when i got to the future era. i got my
population up to around 720,000 and year was 20xx.on another website it was posted to
pollute the city so i tried it by gettin rid of all parks, fountains, and ponds and placed
about 10-15 coal power plants everywhere, even in residential areas. after about 5-10
mi***es i got a message about going to the future. i also did not destroy the big tree,
when i got to the future it was bigger then before.

This is by far the hardest simcity game ever...

Right now, I'm at 92% and the highest I could bring it to is 95% ....

I have a tiny high density industry area with windmill power plants surrounding the city
and then trees.... It seems to me that you need to really focus on the meter above and try
to clear the industry area when the time is right with commerical buildings.....

Besides, I really don't think the future area has any industry buildings....

So to help you guys out, try to be patient with this game... And make sure you use the
money cheat and have low taxes to grow your city....