(Bac C-D 2012)
Agroforestry, that is the cultivation of trees together with crops can help farmers cope with several of the adverse consequences of climate change. The world Agroforestry Center (ICRAF) has assessed the potential for Agroforestry to help adapt to climate change. Researchers have found that planting trees between crops and in the boundaries around crops can help prevent soil erosion, restore soil fertility, and provide shade for other crops.
Agroforestry also has the benefits of contributing to climate change mitigation, because trees and shrubs tend to sequester more carbon than other crops.
(BAC G1-G2-H 2012)
Life for the lower class is very difficult and short. For this reason pitiless rich people might suppose that people in the lower social classes will be more self-interested and less inclined to consider the welfare of others than upper-class individuals, study, however, challenges this idea. Experiments by Paul Piff and his colleagues at the University of California, Berkeley, reported this week in the Journal of Personality and Social Psychology, suggests precisely the opposite. It is the poor, not the rich, who are inclined to charity.
After the last day of the holidays, my uncle Mamadou took me to my new school.
"Work hard now" he said "and God will keep you. You can give me your first impressions on Sunday".
On the Sunday, I complained bitterly to my uncle:
"But I've learnt nothing uncle, I already know by heart all the things they taught us. Is it really necessary going to this school? I might as well go back to Kouroussa at once!"
"No" said my uncle, "Wait a little!"
"There's nothing to wait for. I could see at once that there was nothing worth waiting for".
"Come! Do not be so impatient. Are you always as impatient as this? The school where you are now is perhaps not so good in general subjects, but it can give you practical training which you will find nowhere else. Haven't you been in the workshops?"
Like every other teen, Brian Kennedy of New York City knew all about the dangers of cigarette smoking — the toll it takes on your lungs, heart, and the rest of your body. But that didn't stop him from lighting up his first cigarette when he was only 11.
Tension-type and migraine are the two most common kinds of headaches. Migraines can be triggered by a variety of factors, including fatigue, hunger, emotional stress, or a change in caffeine consumption. Teenager Jonathan Gray suffers from migraines.
All of us get headaches once in a while. But for 1 in 10 people, the affliction is serious. What causes the worst headaches and how can you prevent them?
It's been a complaint of many silver foxes for years but now scientists believe they can prove that stress really does make your hair go grey.
When the going gets tough chemicals are triggered which damage DNA and leads us to look older and also increases the risk of diseases.