There's no one straight answer. A wide range of things will come in this category.
To take a look at some of the areas that qualify click on the link:
https://www.randdtax.co.uk/what-we-do/are-you-overpaying
If you still have questions send me a message today.
Imagine being able to take the power of the sun or the wind and to convert it into heat energy through a process where NO carbon emissions are produced.