Global warming is the hot topic around the world at this time but, there is also dissention about the evidence being presented to support the argument. The earth is known to go through cycles; although the past has never produced an age of so much industrialization causing the pollution currently being experienced. A major source of the problem is the increase in carbon dioxide levels.

　　茶馬古道(Tea-horse Ancient Road)兩邊，生活著20多個(gè)少數(shù) 民族。不同的地方有著各自美麗而神奇的自然風(fēng)景和傳統(tǒng)文化，比 如:大理，麗江古城，香格里拉(Shangrila),雅魯藏布江大峽谷和布 達(dá)拉宮(Potala Palace)。古道的兩旁有廟宇、巖石壁畫、騷站(post house),古橋和木板路，還有少數(shù)民族舞蹈和民族服裝。時(shí)至今天， 雖然這條古道的蹤跡都消失了，但它的文化和歷史價(jià)值仍然存在。 

　　Along the Tea-horse Ancient Road lived more than 20 minori¬ties. Concentrations of beautiful and mysterious natural landscapes and traditional cultures developed in various sites，including Dali old city, Lijiang old city, Shangrila, Yarlung Zangbo River Grand Canyon, Potala Palace. The road features temples, rock paintings, post houses, ancient bridges and plank roads. It is also home to many national minorities and their dances and folk customs. Today, although the traces of the ancient road are fading away, its cultural and historic values remain.

　　現(xiàn)代人類約公元前50000年第一次從中亞或印度來到中國(guó)。這 些石器時(shí)代(Stone Age)的人，居住在洞穴中，穿著毛皮。公元前 4000年左右，這些人開始種植水稻，并飼養(yǎng)羊和雞。約公元前3000年， 他們開始使用陶器(pottery)并住在房子里。到公元前2000年，中國(guó) 人已進(jìn)入青銅時(shí)代(Bronze Age)，并開始用于寫字。約公元前700年， 中國(guó)的金屬工人學(xué)會(huì)制作鐵器工具和武器。

　　Modem humans first came to China from Central Asia or India about 50,000 BC. These were Stone Age people, who lived in caves and wore fur and leather. By around 4,000 BC, these people were starting to farm rice and keep sheep and chickens. By about 3,000 BC, they were using pottery and living in houses. By 2,000 BC，Chinese people had entered the Bronze Age and had begun to use writing. By about 700 BC， Chinese metal-workers learned to make iron tools and weapons.