power point alam sekitar asastahap iii

PERINGKAT ASAS

Disediakan oleh:Jawatankuasa Teknikal KebangsaanKadet Pertahanan Awam ( KAPA)2008

JABATAN PERTAHANAN AWAM MALAYSIA

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KADET PERTAHANAN AWAM MALAYSIA

PERINGKAT ASASTAHAP III

( ATMOSFERA)

PENGENALANBumi dikelilingi oleh satu lapisan udara di kenali sebagai lapisan atmosfera.Atmosfera terbahagi kepada 5 lapisan bergantung kepada suhu dan ketinggian :

ATMOSFERAAtmosfera yang bersih mengandugi campuran gas-gas seperti berikut :: Nitrogen - 78%Oksigen - 21%Karbon dioksida – 0.03 %Gas-gas nadir - 1 %Wap air - tidak tetap

Udara dikatakan tercemar apbila terdapat benda asing dalam atmosfera yang boleh memudaratkan persekitaran, kesihatan

manusia dan kualiti kehidupan.

http://healthandenergy.com/images/diesel_truck.jpg

BAHAN PENCEMAR UDARA

Bahan pencemar

Punca

Debu Kuari, tapak pembinaan, jalan raya

Karbon monoksida

Asap kenderaan

Sulfur dioksida IndustriNitrogen oksida Industri

Plumbum Asap kenderaanPenyumbang utama pencemaran adalah berpunca daripada kegiatan manusia: pembakaran bahan api fossil

PUNCA –PUNCA PENCEMARAN

KESAN PENCEMARAN UDARAKESAN PUNCA AKIBAT

1. Hujan asid Sulfur dioksida Memudaratkan tumbuhan dan haiwan

2. Pemanasan global

Karbon dioksida Peningkatan suhu bumi

3. Penipisan lapisan ozon

CFC Masalah kesihatan

4. Asap rokok Tembakau Masalah peparu dan kanser

5. Jerebu Asap kebakaran Mengotorkan bangunan dan benda

6. Bising Bunyi kenderaan, pembangunan

Mengganggu pendengaran

http://en.wikipedia.org/wiki/Image:Cairo_in_smog.jpg

AKIBAT

KAWALAN PENCEMARAN UDARA

1. Penguatkuasaan undang-undang2. Mewujudkan zon larangan merokok3. Menggunakan bahan bakar mesra alam4. Menggunakan sumber tenaga alternatif5. Menggalakan konsep 3R( reduce, reuse,

recycle)6. Mengunakan alat penapis asap dalam

perindustrian7. Tidak menggunakan gas CFC 8. Kecekapan tenaga

KESIMPULAN

“Earth is everybody's home and nobody likes living in a dirty home. Together, we can make the earth a cleaner, healthier and more pleasant place to live.”

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power point alam sekitar asastahap iii

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