Over the years, scientific advancements have brought both benefits and disadvantages to society. Which of the following is an area which has been both positively and negatively affected by scientific advancements?
a. food safety
b. waste production
c. climate
d. all of the above

a time line cause it goes from 685 to 978

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.

looks like the answer is     c     to me!