It's a loss leader, nothing ununsual, pain today for the promise of better days tomo. After 21 June, depending how fast LHR gets back on it's feet, the route may take off or simply die a quiet death, but they are trying to connect the region to the world, this is a challenge as the world is currently closed. If they don't try now, they may not get another go. It's a very North/South clash, one says "Better to try and fail than not to try at all."
The impact of this on the climate is completely immeasurable, I wouldn't sandbag the garden just yet.