Element of truth

I’ve tried to cut my footprint
(The carbon one, I mean)
By making less emissions
And being slightly green

I’ve separated rubbish
Put things in different bins
Hoping that it’s not too late
To put right previous sins

I often turn the lights off
Put heating below twenty
Because we’re told, officially
That eighteen should be plenty

But I’m a frequent flyer
And I travel every day
So I’m adding to the problem
At least, that’s what they say

I’m living in a forest
An area of great charm
The trees can use some CO2
But am I doing harm?

I’ve heard that our emissions
Last about a hundred years
So how can we act quickly
To dissipate our fears?

And what about my footprint
And the carbon that I leave?
I am a carbon life form
Is there really no reprieve?

The rules seem too demanding
Will I ever go to heaven?
The trouble is, my shoe size
Is a massive size eleven