Skeptics question this assertion. True, many agree that the earth is warming, but they are uncertain of both the causes and the consequences.
मगर इसकी वजह क्या है और इसके क्या नतीजे होंगे, इस बारे में वैज्ञानिक सिर्फ अटकलें लगाते रहते हैं ।