Focusing primarily on both the understanding of our natural and man-made environments, environmental science degrees draw from diverse fields of studies and require a strong background in the more traditional sciences: biology, physics, chemistry, geography, ecology, and even biotechnology.
When and how to pinch back mums. If you decide to prune your mums, you can start pinching stems in spring when the plants have reached a height of about 6 inches. To pinch them back, simply grab a stem between your thumb and index finger about 2 to 3 inches above the base of the plant and just above a leaf and pinch it off.
That 'mummy' derives from 'mum' being the name of the bitumen used for embalming. The 'mum' of 'mum's the word' is 'mmm' - the humming sound made with a closed mouth, indicating an unwillingness or inability to speak. Then geten a mom of heore mouth til moneye weore schewed!