See I understand where youre coming from & scientifically we have the lowest levels of carbon in our atmosphere since the last ice age but the problem is there are no longer enough trees to clean the air & yes some places arnt as bad as others but others places have changed dramatically,look at the glaciers & ice caps theres hardly anything left,an area the size of Texas(Let that sink in the size of texas) broke away & melted,I think the total land mass thats been lost is something like the size of russia,its a real thing unfortunatly.