Population control is the obvious solution to man made climate change, but it’s not going to happen any more than less resources being consumed. Population is predicted to stabilize, increasing by 50% by 2100, partly by lower birth rate, partly by longer lifespan.
As prosperity grows in developing countries they want to travel and have the lifestyles we have now, in normal times you only have to look at the Chinese and other Asian tourists thronging our visitor sites. So global tourism and lifestyle improvement is going to continue, we can use resources more efficiently, the increase in consumption will continue.
We all welcome Attenborough with his solutions to climate change, but with the increasing aspirations of populations in the developing world that can’t happen, it doesn’t mean we’re doomed, solutions will be found. We can and should do our bit by using resources efficiently, others are going to increase theirs.