Green plastic 600字高中英语作文
Plastic, that is, has been widely used in almost all fields. But, in the use of plastic greatly promotes the development of industrial and agricultural production, ich and improve people's material and cultural life, also bring serious "white pollution" problem.
Plastic "decay" themselves, if plastic film exists in the field for a long time,fertilization and microbial balance itself, has adverse effects on crops growth. Developed countries after the use of plastic has been used to bury! fertilization and microbial balance itself, has adverse effects on crops growth.
Use, specifically refers to a certain period have the same effect with ordinary plastic products, and at the completion of a certain efficacy after can quickly break down, the category of polymer assimilated with the natural environment. Chinese academy of sciences changchun institute,the technical appraisement, and prove that this technology has matured in the promotion. also won't affect the soil physical and chemical properties, damage to the soil nutrient
It is green plastic.
Animals sleep
Animals sleep is to rest, but, not all is in order to have a rest.
On summer evenings, bat in the yard, over the desert, the east and the west, high and low flying, they flash to catch mosquitoes, the moth and other flying insects to eat. But such as winter, the weather is cold, mosquitoes, the moth, dying, away from the bats use "sleep" way to deal with food.
Before winter, bat groups to find a dark cave, eaves collective sleep.They sleep method is characteristic of both feet catch rocks, sticks, etc, formed clusters to fall sleep. It's a groggy sleep for four or five months. For next year's spring flowers, mosquitoes, the moth active, bats to stretch and yawning, and start living in the New Year.
Sea cucumbers are sleeping. However, the sea cucumber season is not the winter sleep, but in the summer.The sea cucumber to sleep how long? Generally, want to sleep four or five months, the summer passed, if we met a year of drought, 20 months without rain, the snail "hibernation" it 20 months.
animals’sleep is interesting.
