A Letter to the Children of Class P4

Candidates were invited to respond to the letters written by the class of P4 of Calderbridge Primary School, Wishaw. The children have already received my letter. Below is a copy of my reply to their questions and concerns.

Dear Sophie, Dylan, Eva, Taylor, Polly, Caleb, Alexa and all of the class of P4.

Thank you very much for your letters and for telling me of your worries for the environment and the future of the planet. I am typing my reply because my handwriting is not as neat as yours!

May your teacher, Mrs Currie-Smith, forgive me for the long reply. I feel I am able to do so because I have some things to say. Like I hope many of you will be able to, I was lucky enough to go to university. For me, it was not once but twice. The first time I studied geology, that is the history of the Earth. The second time I studied energy, that is how we use energy to power our lights, homes and phones, and the problems that come if we continue to use the wrong kind of fuels.

You may have heard the term “fossil fuels”? I’ll try to keep this short but it is important to know why burning them as we do today is a bad thing for us and for the animals and plants we share our planet with. So I will tell you, briefly, where fossil fuels come from.

Many hundreds of millions of years ago, there was no life on land. There was life in the sea but on land, there was nothing but deserts. Plants started to colonise the land, spreading out from rivers. Plants use sunlight as an energy source to grow and elements from the ground and air for material. As plants evolved, over millions of years, trees formed vast forests which grew over the land. They took the carbon they needed to form their wood from the air and the hydrogen they need for food from water. When these forests died, their remains were buried and, again over millions of years, the dead wood formed vast coal beds. This is important to remember.

Other plants stayed in the oceans. Many millions of years after the coal beds formed, there were so many tiny plants in the oceans (this was during the time of the dinosaurs) that, when they died they sank to the bottom of the seas. Usually when this happens the plants are eaten but there were special occasions when they were buried instead. So much material that was buried that oil and later, gas, started to form in the rocks from their remains. Like coal, they are made from carbon and hydrogen and there are huge amounts of them. Together coal, oil and gas are known as fossil fuels.

A lot lot later. Tens of millions of years later, people came along. Our ancestors. For thousands of years we have grown crops using just sunlight and water. Power for our tools came from ourselves, animals like oxen and horses, the wind and water for grinding our wheat and for sailing our ships. About 300 years or so ago, we discovered that coal could be burnt to boil water, and the steam used to give greater power to our machines. Our ancestors first used these as pumps to keep mines clear of water, power looms to make cloth and then turned the pumps into steam trains to move goods and people across land, and later steam ships to carry cargo from continent to continent. Later still, we used oil to power our cars, trains, ships, airplanes and tractors, and gas to heat our homes and schools. Coal, oil and gas are still used to generate electricity. We were able to grow more crops, develop more chemicals and medicines, and so, during the 20th Century, the century I was born, there grew to be so many more people than there was previously on Earth. When I was born, there was about three and a half billion people alive. Now, in 2021, there are nearly eight billion people alive! Each one of us, you and me included, need to be fed, kept warm (or cool) and to have a decent life. We need fuel to do this.

Here’s the problem. Currently we still rely upon fossil fuels, coal, oil and gas, to power our machines. To give it a percentage, 80% of the energy we use for our electricity, heating, cars, ships and airplanes comes from these fossil fuels. As we burn these fuels, the hydrogen and carbon that was locked up in the Earth for tens and hundreds of millions of years is being released back into the atmosphere. The hydrogen is not a problem: the combines with oxygen to form water. Oxygen combines with carbon too, forming carbon dioxide (known as CO2). When this happens in large amounts, there is a problem because CO2 helps locks the heat of the sun into the Earth’s atmosphere. And we are doing this over a very short amount of time: a couple of hundred years. Compare that with the millions of years it took all that carbon to be locked up into the ground! Over the past couple of hundred years, we have released thousands of billions of tons of CO2 back into the air. So much so, that the percentage of CO2 in the atmosphere has not been so high since long before people first evolved on Earth. The rate of change has been very short: a couple of hundreds of years. Animals have not had a chance to evolve quickly enough over such a short period of time. The additional heat, trapped by the CO2 blanket, is warming the planet and is the reason the ice caps at the poles are melting. This is the reason why animals like polar bears are having problems. Taylor, you mention the that it is the Sun that causes the ice caps to melt and the fires to burn. We cannot do anything about the Sun but what we can do it control the amount of CO2 in the Earth’s atmosphere.

The extra heat trapped by the CO2 does not just sit and mind its own business. Heat is a form of energy. That energy is used in some places to form strong storms and floods. In other places, droughts occur, causing forests to burn more quickly and over greater areas than before. You mentioned the fires in your letters Dylan. There have always been droughts, storms and forest fires but seldom have there been so many happening time and time again. This is all part of climate change, caused by people like us, over the past few hundred years.

Sophie, you asked what will happen when all the ice caps will melt? It will be a big problem if this happens. Many cities will have to be abandoned and more people will have to find new places to live. We have to do what we can to keep the rise in global temperatures down and preserve the ice caps.

As you ask Polly, what can we do about it? As I said, we are still burning too many fossil fuels and allowing too much CO2 into the atmosphere. If we suddenly stopped though, a lot of people would have a hard time and even die! Homes could not be heated or cooled, which means that in hot summers or cold winters, people would suffer from either heat or cold stress in their own homes. More people would starve because we use fossil fuels on our farms while growing food. I do not mean to scare you but that is the truth. Like you Alexa, I want a good future! It is facts like this why politics and who is elected to be politicians is important. We have to make the choices for the way forward. The choice cannot be between animals and people, the environment or our homes. All are important but the way forward is not easy. In order to achieve the good future that you ask for Eva, politicians have to listen to scientists. This is where we can get objective information from. It is important for you and me to be informed as to what the facts are. Unfortunately a lot of people do not listen to facts, preferring to hold their own opinions. Many people chose to believe only those facts that back the ideas and opinions they already hold. A very big example of this is the current president of Brazil, who is ignoring the science and encouraging big landowners to continue cutting down the rain forests of the Amazon. The world has to tell President Bolsonaro that he is wrong and that the rain forests of Brazil need to be saved.

Another part of the answer to the problem is for us to need less energy. We all need to insulate our homes against the cold in Scotland so we need less fuel to heat them. We also need to get away from releasing carbon when we produce our energy. Solar panels and wind turbines are some of the ways to do this but they take up a lot of land (or sea). Plus we need to store the energy produced. That is a whole load of other technology but here is a hint - batteries are not the best way to store large amounts of energy. Politicians can help to bring all these things about.

The oil and gas industries want to find ways of separating the carbon from the hydrogen before we burn it. The hydrogen would be burnt and the carbon pumped back into the ground. If they succeed, this would get us through your lifetimes but would not be an answer for your grandchildren.

You mention cars Caleb. It is true that we all need to use them less often and that their fuels need to change. I admit I love driving but whenever it is practical, I take the bus and leave the car at home. Cycling is also very good for us but we need better cycle lanes. In this we are still very far behind our neighbours in Sweden, The Netherlands and Germany.

These things are all complicated. I would advise you to be careful of any politician who claims to have easy and quick answers. In truth, not many people, including politicians, understand all the problems involved and how to solve them. That is why we have to work together and be guided by science and the facts. It is up to politicians like me to decide what can be done, what must be done and how fast it is possible to do it. In a democracy like ours, politicians cannot give orders. We have instead to pass laws that can make the system work how we all need it to be.

What can you do at your age? My best advice to you is to give space to the small things near to you. Polar bears and penguins are important but far away. Look after the nature that is close to your homes and gardens. Plants and insects are important. Give homes to bugs like slaters, insects like bees and plant native species if you have gardens. If you don’t (and even if you do) have a garden, ask to join in local conservation groups and get to know and help your local environment and wildlife.

Why is this important? Polar bears don’t eat ice. They are what biologists call apex predators. They need seals, who in turn need fish and squid and, in turn need smaller fish and crustaceans (like shrimp) who ultimately need plants. So the key is to look after the small stuff like plants and bugs and the environment in which they can be happy. If there is enough of them, they will feed larger animals and ultimately big animals like polar bears.

I am sure you have many questions. I am sorry I am not there to answer them. Perhaps one day I can visit your class and answer your questions in person. For the moment though, that is not possible. I am also sorry my letter to you is so long. It is a problem that really interests me. I wish to have the opportunity to deliver answers directly to you, the people of Motherwell and Wishaw and to our country. Maybe one day I will be in the position to help people and the environment better than I am now but for now that is up to your parents and how they vote.

I am proud to be a Liberal Democrat because although we have policies designed to address all the challenges I have told you about, the party does not say to me “You have to think this way and say these things.” Being a liberal means thinking for yourself. I have benefited from wonderful teachers who have helped me to do so. I am old: 55 this year. The last time I sat an exam was only three years ago so, whatever we do, we can choose never to stop learning. Make the best of your time at school. If you need help, ask for it. For those you who do well, everyone can celebrate in your success. If your classmate isn’t doing so good, ask them how you can help. Look after and be kind to each other. If you look after each other, then there is a good chance that your generation will go on to look after the planet too.

If you have any more questions, please give them to Mrs Currie-Smith to pass on to me. I cannot promise to get back to you ahead of the election date but I will try my best.

Kindest regards and best wishes,