如果2012世界末日真的发生，请不要惊讶。
不只是因为玛雅传说，而是科学证明。
升2度C的温度将让地球被毁灭。

從1度C到6度C
英國作家萊納斯（Mark Lynas）閱讀了上千篇科學論文，走訪多位氣候和環境專家，以兩年時間，寫出《六度的變化》（Six Degrees）一書。
書中預測地球每升溫1度C，會帶來的後果；當升溫6度C，就是人類滅亡的臨界點。
升高1度C：
農業地帶會沙漠化，沙塵暴覆蓋城市；三分之一地表的淡水（河流和湖泊）會干涸；低窪的海岸地區將被淹沒；北極熊、海象和海豹絕跡。
升高2度C：
歐洲的夏天，像撒哈拉沙漠般火熱，人們死於熱浪；大火燒毀大量森林；格陵蘭冰原徹底消融，全球海平面升高7米；地球上有三分之一的物種面臨死亡威脅。
升高3度C：
亞馬遜森林死亡；超級颱風將肆虐沿海的城市；紐約市已經泡在水裡；印度次大陸和非洲發生大饑荒。
升高4度C：
永凍土解凍，雪水讓全球暖化加速；英國的大部份地區因為嚴重淹水無法住人；人類被迫遷出地中海區；全球爆發糧食危機。
升高5度C：
海底下的海床釋出的甲烷加速暖化；南北極的冰層融化；雨林已經燒光、變成沙漠；人類為了尋找食物開始大遷徙，過著動物一樣的生活。
升高6度C：
連北極也沒有冰了；歐洲是一片沙漠；地球大部份地區已經不適合人類居住；沿海城市成為廢墟。
超過6度C：
暖化完全失控，任何努力都是徒勞了；超級暴風雨、洪水、硫化氫氣體、以及甲烷火球摧毀地球；人類滅亡，地球只有黴菌能夠存活；地球回到1億5000萬年前恐龍滅絕的年代。

A school in Newark, New Jersey, is teaching sustainability, healthy living and respect for the environment.

Hybrid tugboat helps port cut emissions

One of the busiest ports in the world is becoming one of the most eco-friendly. Video by photojournalist Gabe Ramirez

Photojournalist David Allbritton shows us why letting your kids play with trash can be a fun, eco-friendly activity

CNN's Casey Wian reports on how some California businesses hope going "green" will put them in the black.

CNN's Casey Wian reports on how some California businesses hope going "green" will put them in the black.

HLN Money Expert Clark Howard visits a model home to show you how to save money and energy

Is the Recession Giving Earth a Break?

The lower manufacturing output associated with the recession has had a tiny curbing effect on global CO2 emissions, buying us a tiny amount of extra time in which to address the climate crisis. That's the good news, says paleontologist and extinction expert Peter Ward. The bad news is that severe climate change is happening anyway, and its likely impact keeps him awake at night.

Perhaps we shouldn't feel too guilty about our destructive potential; Ward has famously hypothesized that multicellular life as a whole is suicidal over the long term, and believes that intelligent life might actually provide the only loophole. It would be a shame, though, if we were to finish ourselves off: Ward believes that while other planets in the universe probably do contain intelligent life, they are also likely to be incredibly rare.

How can scientists better sound the alarm, and connect with the public in general? Ward has some ideas about that too, and fondly remembers a late scientist who was one of the best in the field at bringing science to a lay audience.

HLN Money Expert Clark Howard has the greenprints for your home that'll save you big on becoming more energy efficient

Can Obama Keep His Climate Change Promises?

EU Ambassador John Bruton thinks Obama’s stance towards climate change is encouraging, but says Europe won’t be impressed until Congress passes meaningful climate change legislation.

Toyota brings home the top prize at the World Future Energy Summit in Abu Dhabi. CNN's Cal Perry reports.

Gore Is Too Sunny on Climate Change

Stewart Brand

Author, "The Whole Earth Discipline"
One of the godfathers of green explains why “environmentalists grasp at straws a little with wind and solar,” and why Al Gore is too optimistic about our prospects of solving the climate crisis quickly.