What would it cost to reduce greenhouse emissions by the year 2010 to 10 percent below what they were in 1990? The answer to that depends on whom you ask.
वर्ष २०१० तक ग्रीनहाउस उत्सर्जन को १९९० के स्तर से १० प्रतिशत घटाने की क्या कीमत होगी?