With regards to climate change, I suspect all the London airports and their respective growth plans will face a bigger challenge in terms of government environmental policy over the coming years.
Luton council chose not to declare a climate emergency, Uttlesford council (where Stansted is located) did.
Commercial and environmental interests will need to be balanced somehow and I have no idea what the outcome will be but right now it feels as if the pendulum is swinging more strongly towards the environmental arguments.