By Paul Donovan, columnist

The move by London mayor Sadiq Khan to extend the low emissions zone out across the capital must be welcomed.

It is the type of radical measure needed if the pollution epidemic, as well as climate change, are to be addressed.

The regret must be that whilst there do seem to be very real efforts being made to address the problems caused by cars etc, the same cannot be said for aircraft.

Above our heads, the skies simply fill with ever more planes.

The City Airport capacity has expanded, with Heathrow will build another runway.

The old predict and provide policies of the road builders that have proved so damaging on the ground, now appear to be replicated in the skies.

How much longer before action is taken on aircraft pollution?

One of the most striking things about many environmental challenges is that so many seem to demand back to the future solutions.

Things have been done in the name of progress, which in the end, are making people less healthy and putting the future of the planet at stake.

So 25 years ago most children walked to school. Today, many go to school in cars, increasing pollution and contributing to the obesity epidemic amongst children.

It is good to see schemes to get kids and parents out of their cars and walking to school, but why did we go down the driving route in the first place?

The expansion of air travel is also a relatively recent development. Thirty years ago, there were not the planes in the air there are today. Are all of those journeys really necessary?

Many regard it as some sort of human right to have a number of holidays overseas.

But if the choice is a holiday or the ability to feed ourselves and save the planet, surely that is a no-brainer?

The real challenge is to accept that blundering on in this consumerist style, wasting more and more of the world resources, is not the way to go.

To some extent, we need to pull back and start living a bit more simply, accepting that maybe not everything that has been done on the altar of producing more profit for a few people is good for everyone.

The recent campaigns to cut the use of plastic marks a dramatic change. There is a recognition that the world simply cannot go on poisoning itself, producing plastic and throwing it away.

Less plastic must be produced, simply recycling it won’t solve the already huge problems the world has to face. If plastic is genuinely removed from much of daily life, it will mean a different world – maybe simpler but certainly a more sustainable one.It is the sort of questions being thrown up by the plastics revolution that needs to be extended to other destructive practices in the way we live.

If humanity is to survive the present challenges, people need to act collectively, living more simply together for the common good.

See pauldonovan.blogspot.com