Pollution is very serious. If we don't try to stop some of it, then soon, there won't be any clean air to breathe, clean water to drink, or any clear land to use. For the people who use cars, they should change to public transport. There will be less pollution that way.

We need to change everything to solar like solar powered house car and building

I'm sure we realize. We just have idiots going "global warming doesn't exist". as soon as we convince those idiots all will be well ^^. Otherwise, we're already starting to research alternative fuel sources and such

Back in the day, people were perfectly fine walking everywhere they had to go. they enjoyed the scenery, got to spend some time just enjoying the fresh air, and when they got somewhere, they're there. But now, people are too lazy to do just about anything, then they complain how life sucks, and why they are overweight.