My Lords, I am very pleased that the mover and seconder of this amendment have mentioned direct air capture, because sometimes there is confusion between carbon capture and storage and the actual absorption of carbon out of the atmosphere on an enormous scale. Frankly, this is where the big impact will be made in future.
I know that we have made efforts with carbon capture and storage on and off over the years. There is a theoretical idea that finding a way to cheaply cap every chimney of the 9,000 coal-fired stations across Asia and Africa and pipe away the carbon might solve some problems and make a small impact on the overall rising greenhouse gases. However, the most sizeable absorption of carbon that is already in the atmosphere is through direct air capture and climate recovery.
Schemes are already being developed with the input and encouragement of Imperial College and other sources—and in other countries—for developing direct air capture on an absolutely enormous scale. Of course,
we cannot do this alone; this is part of an international rescue, if you like, in a way that really begins to give some hope that emissions can be offset so that we can start getting some leverage and control on the overall carbon in the atmosphere. Without this, we will undoubtedly miss all the Paris targets and everyone throughout the world will face very dramatic and increased climate violence, very cold winters and very hot summers.
So I hope that the Minister will indicate that this area is in the Government’s mind and that the development of huge carbon sinks can commence—for instance, in deserts across the world that have already been designated as uninhabited areas. Carbon can be sunk into gigantic lakes the size of Wales or Dubai, or four times the size of London. These vast new developments would offset the overacidity of the ocean. These things can be done. Carbon can be captured and used. CO2 is a fantastic promoter and fertiliser of food on a colossal scale, and if we are moving into an era of world food shortage, covered areas fed by carbon from huge carbon sinks will really begin to make some impact on the scene.
The other development for carbon sinks is that we could just plant a lot of trees, but that is not very good. Trees are moderate absorbers of carbon although, of course, if they go up in flames they put all the carbon back into the atmosphere straightaway. The real development comes from mangrove groves, which are 16 times more absorbent of CO2 than other trees. They can be promoted along with saltwater and freshwater lakes in areas where there is a lot of sun and where electricity is therefore virtually costless. Of course, this is at or near the equator. These are the schemes that will save us all and which our Government should be leading in developing by thinking about and backing the necessary legislation. Please, can we have a little more thought on this excellent amendment and the ideas behind it?