What is the greenhouse effect, and is it affecting our climate?

The greenhouse effect is unquestionably real and helps to regulate the temperature of our planet. It is essential for life on Earth and is one of Earth's natural processes. It is the result of heat absorption by certain gases in the atmosphere (called greenhouse gases because they effectively 'trap' heat in the lower atmosphere) and re-radiation downward of some of that heat. Water vapor is the most abundant greenhouse gas, followed by carbon dioxide and other trace gases. Without a natural greenhouse effect, the temperature of the Earth would be about zero degrees F (-18°C) instead of its present 57°F (14°C). So, the concern is not with the fact that we have a greenhouse effect, but whether human activities are leading to an enhancement of the greenhouse effect.

最後一日~~

中學生涯 完結~~等緊入大學~ ^^

中7 同中5 感覺真係好唔同

今年好唔捨得 唔捨得d老師 白約翰d老師真係超好

美意同我地圍圈圈傾計 佢真係高貴得泥又細心能幹 係所有人的典範

仲好照顧我的弱小心靈...感激  為左你 我會考好地理

美珍  教學熱誠爆登 開心認識你

miss ken  好人左好多  以前好驚你 e家好鐘意痴住家政學會

羊生  講野冇kum串的話 會好好多 因為係一個好強ge econ 專家

miss wu 好易喊 因為joyce 關係 雖然唔係同佢幾熟 但都睇到出佢好鍚我地

樊太 情緒化外 佢其實係一個好老師 佢的人工幾乎洗哂落我地度

劉sir 雖然冇教過我 但都對我好好 教我寫essay 做數 geo+econ 勁正~!

林麗芬 唔使講 心照 ^^

周慧芳 都係好老師 佢話我e2年緊張左....=_= 冇教我都留意到 ?

mr tam  雖然嚴肅 但都係為學生好

友盛sir  很害羞的一位 不過好用心教~有佢我先 d 到 ~ ^^

陳關來 中一班主任 以前成日俾佢話我鐘意傾計 不過大個左 佢仲好關心我 到e家仲kum funny

志誠sir  很棒的一位老師 ^^ 一切建立於跑步

梁偉剛  很關心我的 因為我同佢女兒一樣 都是玩運動 因為佢 我愛西史

譚惠強  tam sir 正 人人皆知~ 上你堂仲快過坐過山車~

楊美x    好人 不過我受不了轟炸

黃敏麗   top student 做老師 用心良苦 

劉月娟   仁慈 善良 見佢就會笑

仲有仲有  好多好多

因為你地 我會努力高考 我會做個好人

多謝

KATHY's dog papaya is so funny!!!!!!!!!!!!!

http://www.youtube.com/watch?v=jZZQIy4AboM

http://www.youtube.com/watch?v=_EuS2HJE3U0

http://www.youtube.com/watch?v=HLMFJikJs_Y

佢地話:美意對我好溫柔~~~

wahahahahaahaaaa

上次整的 tirimisu.............

i hate raining day especially affected by the cold front in winter...............

but i made some delicious food for myself!!!

its cheese noodles.........!!!!!! (created by walkman ^^)

only put a piece of cartful cheese on the top of noodle when its very hot......wait for a minute ...thats it!!

p.s thank you oscar to buy me a 1gig mini sd¬!