According to evidence presented at the recent International Congress of Humour, held in Switzerland, during the economically troubled 1950 ’ s, the average man laughed for 18 minutes a day, compared with 6 minutes a day during the affluent 1990 ’ s.
वर्ल्ड वॉच संस्थान का सॆथ डन कहता है कि “प्राकृतिक विपदाओं के पीछे मनुष्य का हाथ बढ़ रहा है । ”