| The earth has gone through many natural climatic cycles during its long history. But human activities since the last thousand years has accelerated these changes much faster than normal, causing our earth to undergo major climate change. Scientists explain this is due to an enormous increases in the levels of greenhouse gases. – Greenhouse Gases and Greenhouse Effect – What are Greenhouse gases? When the sun’s rays hit the Earth,... | duniani wamekwenda kupitia mzunguko wengi wa asili ya hali ya hewa katika historia yake ya muda mrefu. Lakini shughuli za binadamu tangu miaka elfu iliyopita ina kuharakisha mabadiliko hayo kwa kasi zaidi kuliko kawaida, na kusababisha nchi yetu kufanyiwa mabadiliko makubwa ya hali ya hewa. Wanasayansi kueleza hii ni kutokana na ongezeko kubwa katika viwango vya gesi chafu. – Gesi chafu na Athari chafu – Je, ni lini gesi... | Hariri |