โลกร้อนคืออะไร??

posted on 05 Dec 2007 20:33 by cud-cup

           Warning!!!

          ภาวะโลกร้อน (Global Warming) หรือ ภาวะ ภูมิอากาศเปลี่ยนแปลง (Climate Change) เป็นปัญหาใหญ่ของโลกเราในปัจจุบัน สังเกตได้จากอุณหภูมิของโลกที่สูงขึ้นเรื่อยๆ สาเหตุหลักของปัญหานี้ มาจาก ก๊าซเรือนกระจก ครับ (Greenhouse gases) ปรากฏการณ์เรือนกระจก มีความสำคัญกับโลก เพราะก๊าซจำพวก คาร์บอนไดออกไซด์ หรือ มีเทน จะกักเก็บความร้อนบางส่วนไว้ในในโลก ไม่ให้สะท้อนกลับสู่บรรยากาศทั้งหมด มิฉะนั้น โลกจะกลายเป็นแบบดวงจันทร์ ที่ตอนกลางคืนหนาวจัด (และตอนกลางวันร้อนจัด เพราะไม่มีบรรยากาศกรองพลังงานจากดวงอาทิตย์) ซึ่งการทำให้โลกอุ่นขึ้นเช่นนี้ คล้ายกับหลักการของเรือนกระจก (ที่ใช้ปลูกพืช) จึงเรียกว่า ปรากฏการณ์เรือนกระจก (Greenhouse Effect)

 

           แต่การเพิ่มขึ้นอย่างต่อเนื่องของ CO2 ที่ออกมาจากโรงงานอุตสาหกรรม รถยนตร์ หรือการกระทำใดๆที่เผาเชื้อเพลิงฟอสซิล (เช่นถ่านหิน น้ำมัน ก๊าซธรรมชาติ หรือสารประกอบไฮโดรคาร์บอน ) ส่งผลให้ระดับปริมาณ CO2 ในปัจจุบันสูงเกิน 300 ppm (300 ส่วน ใน ล้านส่วน) เป็นครั้งแรกในรอบกว่า 6 แสนปี

          ซึ่งคาร์บอนไดออกไซด์ที่มากขึ้นนี้ ได้เพิ่มการกักเก็บความร้อนไว้ในโลกของเรามากขึ้นเรื่อยๆ จนเกิดเป็น ภาวะโลกร้อน ดังเช่นปัจจุบัน

 

 

แล้วถ้าหากเรายังเพิกเฉยต่อสิ่งที่เกิดขึ้น??

- อัตรา ผู้เสียชีวิต จาก โลกร้อน จะพุ่งไปอยู่ที่ 300000 คนต่อปี ใน 25 ปีต่อจากนี้
- ระดับน้ำทะเลสูงขึ้น 20 ฟุต
- คลื่นความร้อน จะมาบ่อยขึ้นและรุนแรงขึ้น
- ภาวะฝนแล้ง และไฟป่าจะเกิดบ่อยขึ้น
- มหาสมุทรอาร์กติกจะไม่เหลือน้ำแข็ง ภายในฤดูร้อน 2050
- สิ่งมีชีวิตกว่าล้านสปีชี่ส์เสี่ยงที่จะสูญพันธุ์

 

 

 

แล้วคุณทำอะไรเพื่อช่วยลดโลกร้อนแล้วรึยัง??

 

 

 

 

 

 

 

::: อ้างอิง
http://www.vcharkarn.com/include/article/showarticle.php?aid=18345

 

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