Is this correct? (unlikely)
To raise purity of crops and plants, I need to;
Find decent purity water, use it to make clay, use clay as well as high purity lime and granite to make gardening pots to plant trees, to make planks to make compost bins, to fill with worms that have been fed with high purity plants to make higher purity compost to use on fields for better food and to use to make next generation trees to make better compost bins? deep breath