It lit the earth and made the sand bright and the water sparkling. The sun also supplied the energy that grew the food you ate. Plants use light energy from the sun to make food for themselves. The food is a kind of sugar. It is also a kind of energy called chemical energy. Green plants change light energy from the sun into chemical energy. Plants use some of that energy for everyday living and growing. They store the rest in their leaves and seeds, in fruit, roots, stems, and berries. The salad and the corn, the rolls, fruit, and coffee all came from plants. You and all animals depend on plants for food.
The charcoal you used for cooking began as a plant too. Once, that charcoal was a living tree that used sunlight to make food and then stored part of the food it made. The energy in this stored food remained, even after the tree died. You used that energy when you burned the charcoal.To understand why someone becomes an optimist or a pessimist, it helps to understand what distinguishes them. Say you crash your car. Do you expect good things to happen after the accident an easy recuperation , a fat check from your insurer? Or do you worry that your neck will hurt forever?
Optimistic people tend to feel that bad things wont last long and wont affect other parts of life, .Seligman says. Pessimists tend to believe one negative incident will last and undermine everything else in their lives.
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