Venus is the answer. That planet has a dense atmosphere of CO2, which has produced a runaway greenhouse effect.
First one is A
Second one is B
Hope this helps !
1 reason is to kill disease in water
Answer:
Cold water can hold more dissolved oxygen than warm water. In winter and early spring, when the water temperature is low, the dissolved oxygen concentration is high. In summer and fall, when the water temperature is high, the dissolved-oxygen concentration is often lower.
Explanation: