Why did scientists think the world was experiencing global cooling between the 1940s and 1970sa. pollution was blocking sunlight b. pollution was trapping heat in the atmosphere c. winter's were the longest and coldest since the last ice aged. biodiversity was declining

The correct option is (a) pollution was blocking sunlight 

At that time, as more and more fossil fuels were being used, the scientists believed that the aerosols, especially sulfate aerosol, produced by burning fossil fuels were causing less solar energy to reach the Earth's atmosphere. Hence pollution was blocking sunlight is the correct option.

All you have to do is pee in some of the number so that's between x 3 the p is like the prime number so i'll let you do is check for primus pride i've been 7 3 4 5 and 6 and you can you can just times or / that