About Burks: Arthur J. Burks (September 13, 1898 – 1974) was an American writer and a Marine colonel. Burks was born to a farming family in Waterville, Washington. He married Blanche Fidelia Lane on March 23, 1918 in Sacramento, California and was the father of four children: Phillip Charles, Wasle Carmen, Arline Mary and Gladys Lura. He served in the United States Marine Corps in World War I, and began writing in 1920. After being stationed in the Caribbean and inspired by the native voodoo rituals, Burks began to write stories of the supernatural that he sold to the magazine...
Unit 8. The stratosphere: our global sunscreen Nguyễn Thị Minh Nguyệt
Tiếng anh chuyên ngành Thổ nhưỡngvà Môi trường đất NXB Đại học quốc gia Hà Nội 2007. Tr 77 – 82. Tài liệu trong Thư viện điện tử ĐH Khoa học Tự nhiên có thể được sử dụng cho mục đích học tập và nghiên cứu cá nhân. Nghiêm cấm mọi hình thức sao chép, in ấn phục vụ các
I read the first edition of this book early in 1950, when I was nineteen.
I thought then that it was by far the best book about investing
ever written. I still think it is.
To invest successfully over a lifetime does not require a stratospheric
IQ, unusual business insights, or inside information.
What’s needed is a sound intellectual framework for making decisions
and the ability to keep emotions from corroding that framework.
This book precisely and clearly prescribes the proper
framework. You must supply the emotional discipline....
Breathing polluted air is unhealthy. For example, you might find it more difficult to
breathe, you might cough or your chest might feel tight.
Two main types of air pollution are ozone pollution and particle pollution.
The ozone we breathe at ground level is bad. But very high in the atmosphere (the
stratosphere) is a natural layer of ozone that is good because it helps protect us
from the sun’s harmful ultraviolet rays. A rhyme that can help you remember this is
“Ozone: Good up high, bad nearby.
The Millennium Ecosystem Assessment (MA) was carried out between 2001
and 2005 to assess the consequences of ecosystem change for human well-being
and to establish the basis for actions needed to enhance the conservation and
sustainable use of ecosystems and their contributions to human well-being.
Unlike stratospheric ozone that protects life on
earth, tropospheric ozone is highly toxic and is the
main pollutant of the atmosphere of industrialized
countries and cities. Its precursors are emanated from
industrial activities and traffic. Generated by lightning,
photochemical reactions or with free radicals, it has a
density of 1.66 times greater than air and is maintained
close to the ground. It decomposes easily, generating
free radicals with oxidizing power. The main primary
pollutants leading to ozone formation are nitrogen
oxides, volatile organic compounds and methane.
The depletion of stratospheric ozone results in increasedUV
(ultraviolet) light below 300 nm, and has signi®cant eects
onbiological systems.Tobetterunderstand the eectsofUV
in this range, early signaling events induced by monochro-maticUV lightwere investigatedusing the chickenBcell line
DT40 andmutants lacking protein tyrosine kinases (PTKs).
AmongMAPkinase familyproteins, P38MAPkinase (P38)
was selectively and immediately activated by 280 nm UV
light in cultured DT40 cells.
In addition to global climate change, these include: the health risks
posed by stratospheric ozone depletion; loss of biodiversity; stresses on terrestrial
and ocean food-producing systems; changes in hydrological systems and the sup-
plies of freshwater; and the global dissemination of persistent organic pollutants.
Climate change and stratospheric ozone depletion are the best known of these
various global environmental changes.