Thats a good question:
is there a difference in the long run, if we emit
the same amount of carbon dioxyde over 50 or over 200 years.

Its the same additional amount in the sum. So does the
nature really "adapt" to that?

Even if Europe really tries hard to reduce the emissions,
there are many thirs world countries that will use up
the less costly fossile fuels then, as long as they are still
available.

Its also still not clear how much of the global warming
can be attributed to the emissions, and how much
is a normal climatical cycle.
Because that affects how much the reduction in emissions can really
change.

Another topic, which is overlooked:
Methane is a much more powerful greenhouse gas.
Cows and rice-fields emit huge amounts of that.
should they be also "forbidden"?