Thankfully it doesn't seem it will double again, population growth is already dropping tonnes. So then, what are you trying to say by saying there's too many people?
The most generous interpretation I can come up with is apologia for the biggest polluters, a smug way to continue to justify not polluting less ('it's just the result of so many people')
The worst interpretation is you are implying there should be less people..?
Or what other interpretation is there? You tell me.
Having just returned from Stockholm to the UK I have to say it was seriously impressive in comparison, atleast in Stockholm greater area I had nothing but good experiences with public transport. The cost of travelling within Stockholm unlimited for a week (£35) on busses and trains is around the price to take 1-2 trains in the UK. And they're so frequent and run for better hours. Not saying this to detract from your message tho, just interesting to see a different perspective ... it's likely theres valid case to improve funding for maintenance and lay new tracks