Khí gây cười là hiểm họa của tầng ozone
ác nhà khoa học Mỹ khẳng định khí gây cười đã trở thành mối họa lớn nhất đối với tầng ozone của trái đất. Nitơ oxit (N2O) là chất khí gây mê, giảm đau không màu có vị ngọt nhẹ và nặng hơn không khí 1,5 lần. Nó được tạo ra từ phân động vật, quá trình xử lý rác thải, phân bón hóa học, động cơ đốt trong và các ngành công nghiệp. N2O không cháy nhưng có tính oxy hóa và kích thích phản ứng cháy. Khí này không duy trì sự sống và có thể gây ngạt.
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