The answer is B. guidelines for safe laboratory practices
Answer:
Explanation:
some gases prevent the escape of heat from the earth.There will be an increase in the percentage of such gases would cause the average temperatures to increase world wide.This is known as greenhouse effect.Carbon dioxide is one of the green house gases.An increase in the carbon dioxide content in the atmosphere woul cause more heat to be retained by the atmosphere and lead to global warming.
The correct answer is catalyst. Hope that helps.
point b i think, because you have to see the amount of steepness in the slope.
