Answer:
a documentary about the holocaust
Explanation:
documentaries contain primary sources like pictures and videos however they are interpreting them so they are typically not seen as a primary source as a whole
This statement is true. Soil color only reflects the amount of organic matter that is currently present in the soil. If the soil seemed to be much darker, it means that the soil has a greater amount of organic materials which makes it better.
Answer:
Global dimming is the reduction in the amount of global direct irradiance at the Earth's surface that has been observed since systematic measurements began in the 1950s. The effect varies by location, but worldwide it has been estimated to be of the order of a 4–20% reduction.
Explanation:
