As Boris criticises Brazil; he might want to reflect that until the 1990s; here in the UK we used to set our own fields on fire to burn the stubble. I remember the smoke; and the red sun and moon.

I am pro preserving the rain-forest; but interestingly enough that is also a human managed environment and has been for 1000s of years.

As for bio-diversity; I am pretty sure a lot of the UK was once forested and certainly had wolves, bears and other inconvenient creatures; at this point we are starting to even wipe out our insects. For the sake of bio-diversity we should re-introduce all those animals.