ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY ADAM HART-DAVIS / SCIENCE PHOTO LIBRARY
Dying leaf. Close-up of a dying leaf showing loss of chlorophyll, the green pigment that captures light energy in photosynthesis. A variety of factors can produce symptoms like this, including nutrient deficiency, adverse environmental conditions and plant disease. In this case the cause was the 1995 summer drought in the UK.
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