Â©2003 Why is there a decision to make about having mammograms to screen for breast cancer? A mammogram every two years to screen for breast cancer reduces the chance of dying from breast cancer among women aged 50 to 69 years. It is unclear if women aged 70 years and older get the same benefits. mammogram every two years to screen for breast cancer reduces the chance of dying from breast cancer among women aged 50 to 69 years. It is unclear if women aged 70 years and older get the same benefits.
Temperate grasslands are located north of the Tropic of Cancer (23.5 degrees North) and south of the Tropic of Capricorn (23.5 degrees South). The major temperate grasslands include the veldts of Africa, the pampas of South America, the steppes of Eurasia, and the plains of North America.
The main temperate grasslands are the steppe in Eurasia, the prairies of North America, the downs of Australia and New Zealand and the pampa of Argentina. Temperate grasslands produce plants with long, extensive roots that dig deep into the mollisol (soft, nutrient-rich) soil.he temperate grasslands are often very colorful. Most temperate grasslands are inland and are therefore much windier with tornadoes, bursters, northers, burans, and chinooks. Temperature extremes are wider than anywhere in the world, but annual rainfall averages from 12-20 inches.